Impact of R&D&I on the Performance of Spanish Construction Companies

Deciding whether certain factors should be considered drivers of innovation in construction firms is crucial in terms of improving their performance and survival in an environment that is changing by leaps and bounds. +roughout the years, construction companies have been considered to be traditional and without the tendency to innovate. However, several studies have confirmed that this perception of the sector is evolving and that successful instruments from other industries are gradually being adapted for the benefit of the industry. +e objective of this paper is therefore to investigate the potential factors affecting the performance of these organizations. Eighteen factors related to the individual, group, and organizational levels were identified through a review of the literature and an instrument developed that was validated by experienced professionals. A questionnaire was sent to 103 people working in the sector at the national level to obtain their views. +e results of the classification analysis indicate that “technology and equipment” and “software acquisition” are considered the two most significant factors. In addition, these 18 factors can be classified into 7 groups: (i) internal drivers of innovation; (ii) innovation within the organization; (iii) technological innovation; (iv) technological links with the environment; (v) external drivers of innovation; (vi) innovation in processes; (vii) a culture of innovation in the company. Innovation in processes has the highest level of impact. +is research deepens the current understanding of the factors at different organizational levels that must be highlighted in the implementation of an R&D system in order for companies to improve their performance and survival in future processes.


Introduction
e traditional construction sector, which is made up of companies focused on infrastructure construction, has played a crucial role in the development of many countries' economies [1], despite periods of instability. e relevance of this sector has not been restricted to its direct effects on the economy but has been increased by the so-called "tractor effect" exerted by the sector on other economic activities, which doubles its total [2].
Recent years have seen an increase in studies that consider social aspects in multicriteria assessments of infrastructure. Aspects such as cohesion, culture, or research and innovation were unusual at the beginning of this century [3].
In the economic cycles of countries, there are factors that can have a negative impact on economic stability; the case of the construction industry in Spain is an instructive example, as a combination of factors including the decrease in housing demand after 2006, the "real estate bubble" that burst in 2007, the onset of the international financial crisis, and the sharp cuts in the budget for public infrastructure, aligned with the financial adjustment policies of the European Union (in which capital provisions were reduced by 74% between 2006 and 2011) [4], producing serious destabilizing effects that weakened the industry. However, since the first quarter of 2015, the sector has been reestablishing itself [5] and is now in a process of transformation in which axes such as digitalization, innovation, sustainability, and energy efficiency are reconfiguring traditional patterns. Adding that most infrastructures are designed to serve a significant group of people over a long, intergenerational period, the assessment of different dimensions of sustainability related to infrastructure design has been the focus of many researchers in recent times [6].
With regard to the situation of the construction companies, the sector shows a very dispersed business configuration, and 98.7% of all of these companies are SMEs. It is extremely important for the development of the construction industry that companies with between 50 and 249 workers begin to represent a higher percentage than their current level of just 1.2%, since medium-sized and large companies are in general better able to withstand adverse economic circumstances, in addition to having better financing conditions and being more competitive. Small firms are hampered in their growth by a lack of access to finance, the risk of defaults, and the inability of most firms to expand into international markets. e labor market in the construction sector has seen a more accentuated loss of employment than the other sectors of the economy, meaning that the recovery of the workforce has been slower; in addition, with the emergence of new work systems linked to technological progress, the use of new materials and the optimization of production processes require an increasingly skilled and professional workforce. Another fundamental aspect of the labor market in this sector is the need to create a generational relay according to the demands of the environment, since it has been statistically shown that only 9% of workers in this field are under 30 years old, clearly demonstrating the aging of this sector [5].
ere have been three significant published studies on the impact of different business strategies on construction innovation in firms or on projects. e theoretical bases of these were reviewed to inform the structure of the current research. e first previous study, undertaken in the Australian construction industry in 2006 [7], drew on a large-scale survey of the Australian construction industry. e nature of innovation competence was measured by four key innovation indicators: investment in R&D, novelty of innovation, adoption of advanced practices, and the impact of innovation on the profitability/effectiveness of enterprises.
is method, which focuses on "the innovation competence of repeat public sector clients," was developed to address problems in measuring innovation activity in other surveys. e results show that the clients have a relatively high level of innovation competence, compared to contractors, consultants, and suppliers. e second previous study, undertaken in Spain, in 2012 [8], assessed the drivers, success factors, benefits, and barriers to innovation in a medium-size construction firm with a standardized innovation management system. As in the Australian study, there are coincidences in the client study, although it is seen from a different perspective. Whereas in Manley's study [7] clients were seen as drivers of innovation in the industry in Pellicer et al.'s 2012 [8] study, the client or contractor collected ideas that become innovation projects. e third previous study, of the Spanish construction industry in 2014 [9], was founded on the validation of a model developed by a case study; this is focused on a medium-sized construction company which implemented and certified an innovation management system, as established by a Spanish standard.
is paper builds on these earlier contributions by examining the relative contribution of a more comprehensive range of internal and external strategies to innovation in the construction industry. It is based on the vision of the personnel of different hierarchy and age range obtaining an approach not only referring to managerial positions.
It is more immersed in the analysis of the internal and external factors of the organizations, adding additional perspectives for the construction sector in Spain.

Literature Review
Innovation enhances the competitive advantages of nations, industries, and companies [10]. Despite the innumerable definitions that exist for innovation, we emphasize the following aspects in this paper: (1) e transformation of an old process [11] (2) Carrying out activities in a different way (3) e creation of new elements and processes for the market [12] (4) e adoption of changes, seen from the perspective of novelty for the adopting organization Although there are multiple definitions of R&D, it is considered in this research to be creative work carried out in a systematic way, whose objectives are the creation of new knowledge or the use of existing knowledge adapted to one's own benefit. ere are three main categories of R&D, as follows: (i) Basic research: the generation of new knowledge without a predetermined objective (ii) Applied research: the obtaining of new knowledge with a predetermined objective (iii) Experimental development: the creation of an original model that can be established as a prototype for future applications e main aspect required for an activity to be considered R&D&I is the systematic generation of new knowledge [13]. Innovation can be planned, organized, directed, and controlled by engineering managers in the same way as any other business activity in a project-based company [8].
Similarly, innovation can be classified as technological or organizational. e former has a technical or physical character that involves innovation in products or processes, while the latter is directed towards advanced business practices such as marketing and management [14].
If innovation is seen as a systematic search for opportunities [15] and is integrated into financial management and strategic planning, it is very possible that it will achieve a pronounced positive trend with respect to the organization, that is, the attainment of more stable trajectories [16][17][18][19][20][21][22][23][24][25][26][27].
In this sector and according to the OECD definition [14], organizational innovation is referred to as the application of new organizational methods and changes in business practices. It can be divided into three approaches, corresponding to business practices, site organization, and external relations with the company. In addition to this, organizational innovation can improve the capacity to generate, acquire, adapt, and use new knowledge, the ultimate goal of which is to raise the level of competitiveness of the organization. However, to ensure improvements in competitiveness, it is essential to have internal knowledge of the organization, experience in the training of personnel, and know-how about the organization and how interdepartmental information flows, including the objectives and criteria for social improvement [28].
A factor that is very closely linked to organizational innovation is the way in which processes are carried out, and it is evident that innovation in processes leads to an increased technical capacity to solve problems and develop more efficient processes [29]. is also applies to business management, which in the construction sector includes topics such as operational and strategic planning, financial management, total quality management, control, marketing, and knowledge management [30,31]. e culture of innovation in an organization can be defined as the way in which the organization manages its work environment. is environment can be manifested as a complex combination of individuals and groups in which each has different assumptions, behaviors, and ideas, which change over time and are influenced by the institutions in the environment [32].
In summary, it represents the meaning of working in an organization [33]. It influences the commercial practices of companies and their knowledge management practices [34] and is recognized as a source of innovation and competitive advantage [35], provided that there is an exchange of knowledge including a space for creativity [30].
In order to strengthen the culture of innovation in a company, there needs to be collaboration between senior management and staff. Senior management stimulates the connection between innovation sources and organizational models, communication within the company, tolerance of errors in new practices, and staff participation through delegation of responsibilities; this causes the development and adaptation of innovation, skilled labor and skilled professionals, and increased productivity [36][37][38].
On the other hand, staff must be trained in order to be prepared for change and to generate lifelong learning processes [39]. At present, professional engineers are required to have more than the technical education acquired through their traditional Bachelor's degree programs. Employers who require their businesses to be well-managed demand this in order to achieve higher levels of productivity and quality. Skills such as leadership, management, communication, teamwork, and critical thinking are among those now required to be an effective professional engineer in a management position [31].
A culture of innovation generates intangible assets that can explain competitive business success, and vice versa [40,41].

Innovation in the Construction Sector.
In the construction sector, innovation is perceived as risky decision-making whose outcomes are dubious and complex in nature [42][43][44][45]; its purposes are determined for a single project and a single client [46]. e recovery of investments made for its implementation is significantly more complicated than in other sectors [47], and it has shown slower progress [48].
Most organizations consider their performance in terms of aspects that ensure their survival, such as the fulfillment of their mission, objectives, or goals, but since the 1970s, other variables have emerged that have been added to the analysis, such as morale, innovation, adaptability, and orientation to change [49]. Another characteristic inherent to the sector with respect to innovation is the marked influence that productivity and quality have on the final product [50,51].
It has been shown that innovation in the construction sector is informal, unregistered, and tailor-made for specific projects [9,52].
In spite of the delays and problems in the construction sector with reference to innovation, several reports have identified that innovation in construction is becoming the main competitive tool allowing companies to penetrate the market and increase profitability [53], without forgetting the importance of social factors by including innovative concepts in infrastructure design [6]. Companies in the construction sector undoubtedly constitute a great challenge for research into management and innovation [54].

Materials and Methods
is research was based on a review of the literature, an analysis of innovation surveys applied generally to both the productive sector and the construction sector, and a questionnaire on data collection. Among the questions considered, seven (questions 19-25) were adapted and modified from an existing questionnaire developed by INE [55] and ENIT [13]; this questionnaire was adapted because both surveys measure innovation in the industry in general, on the one hand from Argentina and on the other from Spain, so the questions closely matched the purpose and context of this study. An additional eleven questions were developed based on a literature review and then added to the questionnaire to further capture the characteristics of the innovation orientations.
e first stage of the research identified the current state of the construction industry in Spain, its links with economic and political fluctuations, and the repercussions of innovation activities in these companies. Following this search process, 18 factors at individual, group, and organizational levels were identified from the selected final articles, as summarized in Table 1.
Advances in Civil Engineering e second stage of the investigation included three phases: the creation of a survey with a five-point Likert scale, a pilot test, and the dissemination of the survey. e target population was mostly experienced personnel from the construction industry in administrative and field positions at different levels of the organization.
A pilot study was carried out with 10 middle or senior managers from different companies to check the relevance of the questions and to identify any ambiguity in the wording of the questions. Based on their suggestions, the questionnaire was revised to improve its accuracy and readability. In the final questionnaire, a five-point Likert scale was used to measure the respondents' opinions on the influence of each factor (1 � very low impact, 3 � moderate impact (neither low nor high), and 5 � very high impact).
In this study, two methodologies were used to collect information. In the first instance, a nonprobability sampling was carried out for the sake of convenience, due to the lack of a sampling frame favorable for the application of random sampling. e participants were drawn from companies that could be identified through the SABI platform (in which identification is based on e-mail, telephone, etc.) and who voluntarily agreed to respond to the survey by e-mail. e resulting sample included 94 companies, obtained by proposing to manage a 95% confidence level, a 6% estimation error, and a 10% probability that the event under study will occur.
After four months of data collection, information gathered from 103 companies was used in the final data analysis.
e profiles of the respondents are shown in Table 2.

Results and Discussion
e reliability of the measuring instrument was measured by calculating Cronbach's alpha.
is involves obtaining the total percentage of the variance of the indicators attributable to the construct.
In order to determine the extent to which the correlation levels are reliable, we can analyze the correlation coefficients; the closer these values are to one, the higher the internal consistency and reliability of the instrument are.
SPSS statistical software was used to evaluate the reliability of the measuring instrument based on Cronbach's alpha. is application allows us to determine the values associated with each of the indicators and to examine how much they would vary if any of these indicators were eliminated. It is therefore a useful tool for determining whether it is possible to improve the reliability of the proposed measurement instrument by eliminating any of the indicators that do not have sufficient levels of correlation with the construct to which they are associated. is process is especially useful for debugging scales by eliminating items that are not suitable for measuring the constructs [72]. Decentralized organizations, often referred to as "skunkworks." ese refer to organizations with a high degree of autonomy, in which a small and structured group of people work on researching and developing a project mainly for the sake of innovation [70,71] 4 Advances in Civil Engineering

Ranking of Factors.
e value of Cronbach's alpha was 0.843, which is much higher than the threshold of 0.70 [73], and this implies high reliability for the data. As shown in Table 3, the mean scores for the 18 factors range from 3.845 to 2.738. To select the critical factors, the normalized values of the mean scores were calculated. e same method was applied by Xu et al. [74] and Zhao et al. [75], who determined that the critical factors were those with normalized values of 0.50 or more. is principle was applied here, and factors with mean scores closest to the maximum mean of all factors are therefore considered critical. irteen of the 18 factors have normalized values greater than 0.50 and are therefore considered critical (Table 3).
Of these, "technology and equipment" was ranked first, indicating that each member of the group knew and had a favorable opinion on this factor, considering it to be paramount and to have a high impact. "Software acquisition" was ranked second, indicating that almost all respondents believe that this factor represents an important source of innovation. e perception of a "decentralized organization," also referred to as a skunkworks project, was ranked in the last place. is factor is therefore the least important, and this was confirmed by an analysis of the answers obtained. e main reason for this may be that the traditional type of structure in this sector has worked in a different way over time, and the use of a structure with these characteristics is unfamiliar and unimportant.

Exploratory Factorial Analysis.
is is a multivariate method that makes it possible to associate variables that are strongly correlated with each other, and whose correlations with the variables of other conglomerates are smaller [76]. It is therefore used to analyze the underlying groupings among the 18 identified factors involved. e ratio between the sample size and the number of factors is 5.72. e factorability of the correlation matrix is tested using the Kaiser-Meyer-Olkin Index (KMO) (KMO ≥ 0.50). is statistical analysis gives values of between zero and one, where figures close to zero (or substantially less than 0.5) give information about the inconvenience of using an exploratory factorial analysis.
Bartlett's sphericity test, which identifies the presence of correlation between the variables analyzed, also allows us to determine the convenience of using factorial analysis by assessing the null hypothesis with the usual significance level of 0.05%. is assumes that the correlation matrix is equal to the identity matrix and would indicate that the variables are not correlated.
e communalities indicate the percentage variance of each of the analyzed items that is explained by the set of factors; in other words, they refer to the common variance among the different variables and are widely used in common factorial analysis [77]. Values lower than 0.5 imply that the level of explanation of the model by the variable in question does not reach sufficient levels and the variable should be dispensed with if it is of little importance in relation to the objectives set out in the research. SPSS was used to carry out the exploratory factorial analysis, through which it is possible to obtain the different matrices, statistics, and adjustment measures that will allow the validity of the different scales to be examined in relation to each of the constructs analyzed [72]. e KMO value is 0.785, indicating a high degree of common variance between the factors. e result of Bartlett's sphericity test is 528.671, with a significance of 0.000, indicating that the population correlation matrix is not an identity matrix. e data are therefore appropriate for principal component analysis (PCA).
An analysis of the main components was carried out to identify the groupings of underlying factors, resulting in the extraction of seven groupings with eigenvalues very close to one. ese seven groups of factors explain 69.76% of the variance (as shown in Figure 1 and Table 4); a minimum of 60% is typically used for the extraction of the factors [78]. Table 5 presents the groupings based on varimax rotation. e factorial load value represents the contribution of the individual factors to each underlying cluster, and all factorial load values exceed the value of 0.45 recommended by Comrey and Lee [79]. Table 6 gives a summary of the analysis of variance (ANOVA) results.

Internal Drivers of Innovation.
e primary reasons perceived by respondents as having the greatest impact on company performance are related to internal drivers of innovation. is grouping comprises three factors: (i) highly motivated work teams; (ii) quality management systems focused on customer satisfaction; and (iii) internal information sources. ese factors reflect the influence of strategic and organizational values concerning the company structure. In other words, they represent organizational changes that influence the external environment [80]. e factors affecting motivation in work teams can be classified into (i) positive work environments; (ii) the ability of staff to perform their work; (iii) and incentives received from management [81]. A combination of these factors can reduce the obstacles to innovation in processes [56]. e results of the survey put this factor in the fifth place (see Table 3, ranking of factors).
Motivation is associated with the idea of a purpose that a work team seeks to achieve. From the authors' point of view, the motivation at individual and collective level is a determining factor for companies' success and competitiveness.

Advances in Civil Engineering
Quality management systems focusing on customer satisfaction have been booming in recent years, at least in the SMEs in this sector [46,69].
It is important to define the client in an independent way, as he or she is a very important factor in the innovation and marketing process. Marketing processes are strongly correlated with quality management systems based on customer satisfaction, an aspect that deserves more attention [82]. It appears that, in order to remain competitive in the market, organizations should make sure their customers' expectations are properly met by developing new or improved products/processes or services and delivering the construction output within cost, time, and quality parameters.
In summary, what stands out in this section is that customers are increasingly focusing on quality and avoiding building repairs [50,51], and if a customer is satisfied, the other interested parties will also be satisfied. Although this factor is increasing in importance, it is ranked in the tenth place.
With regard to internal information sources, it is determined that it is possible to improve both the competencies among interdepartmental collaborators and the performance of the company [8].

Innovation within the Organization
. Surprisingly, innovation within the organization was a secondary factor in this analysis. is cluster explains 10% of the total variability and comprises three factors: (i) sources of education and research; (ii) staff dedicated to research and development, in units or departments that are specifically focused on these activities in a formal way; and (iii) the creation of decentralized organizations (skunkwork projects). is grouping represents the existing links between companies or educational centers and the formal establishment of R&D departments, in which people dedicated research and development work in units or departments specifically to these activities. Decentralized skunkwork projects are small groups or organizations with a high degree of autonomy who carry out the functions of researching, developing, marketing, and producing new projects and products for the sake of innovation [70,71,83]. Moreover, these projects promote economic well-being, and they may complement many social interventions as well [84].
One obvious fact is that two of the components of this cluster, the creation of decentralized organizations and the formal establishment of R&D departments within the organization, have the lowest levels of impact on business performance, as rated by respondents. is is due to a lack of familiarity and knowledge of these items by respondents.

Technological Innovation.
is comprises two factors: (i) technology and equipment and (ii) technology related to contracting. Equipment-related technology was identified by the respondents as the most important factor that produces a significant impact on the performance of organizations. e most representative form or at least showing tangible results that influence the productivity of the companies is the technology in the equipment. In this document, it has not been the exception since it is positioned as the factor of greater impact according to the results obtained.
Concisely, to examine how the different mechanisms of equipment technology change have influenced the productivity in the sector, we can use two factors as examples: information processing and ergonomics.
Information processing: over time, construction equipment has been designed to provide greater and more accurate information regarding internal and external processes.
Ergonomics: it is defined as technology that alleviates physical stresses imposed by the work environment on the human operator.
is result aligns with the work done by Goodrum and Haas [63], in which equipment and technology were found to be key factors in the long-term improvement of productivity.
Contracting-related technology refers to the acquisition of rights to use patents, unpatented inventions, licenses, trademarks, designs, know-how, technical assistance, or technological services. e respondents considered this to be the sixth most important factor.   Advances in Civil Engineering

Technological Links with the Environment.
is grouping explains 6% of the total variability, comprising two factors: (i) professional and industry associations and (ii) software acquisition.
Professional and sectoral associations, which act as links between companies in the sector, involve collaboration agreements between companies and chamber of commerce, engineering colleges, and so on. is factor was ranked the 14th in importance.
With respect to the acquisition of software, the respondents were conscious of the positive effect produced by continuous training and updating of tools used in their jobs, in this case software. ey classified this as the second most important factor with a significant impact on the performance of construction companies.
Moreover, the results show evidence of some changes in staff thinking in companies in the sector in favor of usage of new software in addition to the use of cloud computing and its potential benefits in networking.
e ANOVA analysis carried out in this study highlights the characteristics that generate the different perceptions of the respondents about those factors. e two categories of respondents who perceived this main component differently involved profession and age. When the profession of the respondents was characterized, statistically significant differences were detected. ese differences will be analyzed in the subsequent sections.

External Drivers of Innovation.
e grouping includes four factors: (i) public policy instruments; (ii) client influence, including requirements, competence, and level of sophistication; (iii) external influences; and (iv) construction market sources.
A possible definition of the external drivers of innovation, seen from the company's perspective, is the ability to assimilate and adopt technologies from outside the firm, such as the improvements to the design of products and the exploitation of existing technologies through technological vigilance in favor of increased productivity. It is not necessarily a question of achieving major innovations but of gaining experience and developing productive capacity by Table 5: Grouping matrix after varimax rotation.

Number
Factors Grouping  i  ii  iii  iv  v  vi  vii  10  Motivation  0.644  ------18  Customer satisfaction  0.806  ------19 Internal sources 0. 584  ------21 Education and research -0.498 Decentralized organizations  -0.733  -----13  Technology and equipment  --0.757  ----24 Contracting technology --0.710 ----22 Professional and industry associations - Software acquisition - Public policy instruments -- Influence of the client -- Construction market sources -- Knowledge transfer --- Notes. Grouping names: i: internal drivers of innovation; ii: innovation within the organization; iii: technological innovation; iv: technological links with the environment; v: external drivers of innovation; vi: innovation in processes; vii: culture of innovation within the company.   Advances in Civil Engineering adapting and improving the technological knowledge obtained, in terms of both products and production processes [24]. e first factor, related to public policy instruments, refers to their effectiveness in fostering innovation in the construction industry. e challenges faced by companies in the construction sector today and about statistical and economic data analyzed generate a chain of actions at different levels, such as existing fiscal benefits for investment in R&D and innovation [8] and the standardization of innovation processes through the UNE 166000 set of standards, one of the first in the world to offer a certifiable standardized management system for innovation.
e Spanish Ministry of Development introduced another change in this direction in 2006, allowing the final score for public tenders to be reevaluated if R&D activities are included in the project, and for this score to be increased by between 10% and 25% [9,85,86]. Also, it is important to establish improvements in the public methodologies on decision-making in infrastructure that best represent social needs [3].
Respondents in this section ranked public policy instruments in the 15th place, considering it one of the least important.
With regard to the influence of the client on the level of demand, the respondents placed this factor among the top four. is result agrees with that of Barlow, Manley, and Pellicer in that the drive for innovation arises when the clients demand results that surpass the usual level. As the client becomes more demanding and experienced, it is more likely that innovation will be driven in the relevant projects [7,9,65].
Regarding external influences, it is well known that the construction sector is not a natural creator of technology; however, employing technology linked to the market will give the most positive results. In this case, the market comprises competitors or other undertakings in the same branch of activity.

Innovation in Processes.
is construct includes two factors: (i) transfer of project learning to ongoing business practices and (ii) feedback cycles at various stages of innovation.
e transfer of project learning to ongoing business practices, especially in project-based enterprises within the sector, often presents difficulties, since the internal processes for storing and reapplying innovative ideas are weak [54].
Project communications and feedback cycles could be the key to positively impacting the performance of construction projects in terms of time and cost. In other words, collective sharing of experiences facilitates personal development and enables effective project learning.
Continuous feedback cycles of lesson learned strengthen innovation processes. Several research studies agree that innovation processes contribute to improving the commercial performance of construction firms and identify similar characteristics in their interactive models [9,[58][59][60][61][62]. All of these models emphasize the existence of important feedback loops between the stages of innovation, while recognizing two main types of innovation drivers: those external to the firm (environmental factors) and those internal to the firm (strategies, capabilities, and characteristics).

Culture of Innovation in the Company.
is comprises two factors: (i) recruitment of new graduates and (ii) collaboration, cooperation, and camaraderie of staff.
A company's culture is founded on aspects such as its history and environment and is revealed in aspects such as communication and language, the system of production of materials, social and immaterial goods, interpersonal relations, leadership, and subcultures [87]. Culture can be used as a managed means of improving performance and achieving objectives [88]. e management of an organization can then formulate an internal strategy to emphasize the identification and cohesion of the members around the key values of the external strategy.
Human resources issues are essential and relate to the impact of employees in construction organizations. Likewise, leadership, which can be seen as a combination of skills and knowledge, influences and motivates workers to carry out their tasks, including issues such as negotiation processes, conflict management, and team building [31].
With regard to the factor of collaboration and cooperation of staff, the results of the survey reveal that, in order for innovation to be carried out in this area, there must be collaboration between the different levels of the organization chart. In other words, there must be participation and commitment on the part of both workers and management in the development and adaptation of technological innovation. Table 3 (Ranking of factors) lists all of these factors according to their level of importance.

Analysis of Variance by
Factor. An ANOVA is performed within each of the variables studied, in order to assess whether there are significant differences between them. It assesses the variance among groups and within groups and calculates a metric that indicates the level of significance among the variables.
With respect to the level of significance, the P value determines the validity of the hypotheses. If P > 0.05, then the average behavior of the means is equal and the hypothesis is accepted. Otherwise, the hypothesis is rejected, since there are significant differences between the categories. e results obtained in this research are shown in Figures 2-4.

Profession.
e average values between the road, canal, and port engineers and staff from other professions revealed a statistically significant difference with respect to internal drivers of innovation (i) with P � 0.028. Figure 2 shows that this difference between the perceptions of other professions means that internal drivers of innovation have a Advances in Civil Engineering greater impact on the performance of companies than the opinions of road, canal, and port engineers. e professions considered here are divided into five levels, as described above. Likewise, for the seven components tested, there is a statistically significant difference with a 95% confidence level between the mean values of factor (iv) (technological links with the environment), from one profession to another with P � 0.029. On average, architects and technical architects consider that the technological links with the environment have a greater impact on the performance of the company than the other professions.
Another important aspect shows significant differences between the average values of factor relating to innovation in processes (vi) from one profession to another with P � 0.04. Graduates in economic/financial positions within the organization consider that innovation in processes has a greater impact on the performance of the company compared to other professionals.

Age.
e perceptions of the respondents were analyzed in regard to factor (iv), the technological links with the environment, considering the age of the respondents. is category included two ranges: 41 to 50 years old and over 51 years old. e ANOVA analysis revealed (P � 0.009) that respondents in the 41-50 age range believe that the technological links with the environment have a greater impact on company performance than respondents over 51.
In this study, the age ranges are classified into four categories (see Figure 3). In this case, the two components that revealed significant differences with respect to factor (vii) (culture of innovation within the company) were the 23-to 30-year-old and 31 to 40-year-old ranges. Workers between 23 and 30 years of age consider that activities that benefit the establishment of a culture prone to innovation will have a positive impact on performance, with P � 0.018. Respondents between 31 and 50 years old consider it to have a lesser degree of impact.

Company Size.
is subsection focuses on the perceptions of the respondents in regard to the size of the company.
e ANOVA analysis showed that the two categories (micro-and small enterprises) differed significantly (P � 0.07) in their perceptions of how the implementation of an innovation culture in the company affects performance. Figure 4 shows that microenterprises consider that this factor has a greater impact on enterprise performance than small enterprises.

Conclusions
is research has studied the correlation between elements considered to be innovative and the performance of companies in the construction sector in Spain, via the application of a survey of a sample of 103 companies. e analysis results indicate that 13 out of 18 factors relating to individual, group, and organizational levels were identified to be critical factors, of which "technology and equipment" and "software acquisition" are regarded as the two most significant. In addition, the factors can be assigned into seven groupings: (i) internal drivers of innovation; (ii) innovation within the organization; (iii) technological innovation; (iv) technological links with the environment; (v) external drivers of innovation; (vi) innovation in processes; (vii) a culture of innovation in the company. Technological innovation is especially strong among the seven groupings. e implications that have the greatest degree of impact and that can be drawn from this research are the following: (1) Technology and equipment and software acquisition are two attractive factors when talking about innovation; however, factors such as collaboration, customer influence, and motivation are considered fundamental for innovation strategies to work and to be successful. perceived as unnecessary. is is because they are long-term strategies and if they are not put into practice, they disappear. (4) If the aspects of R&D considered here as producers of impact on the company's profits are not systematic, they disappear and return to "informality." (5) e microenterprises combined with the youngest employed staff (23 to 30 years) are aware of the positive impact produced by the systematic development of an innovation culture.
In this way, this study expands the existing literature on innovation, based on the theory of external and internal drivers, innovation in processes, and innovation culture within the organization in the context of the Spanish business environment, where few empirical studies have been applied to the construction sector.
Although the research provides relevant information, this paper presents a study of a small sample of construction companies, and the results cannot yet be extrapolated to the sector as a whole; however, this analysis does raise interesting considerations for future research.
As future lines of research, it is necessary to study in depth the influence that the client has on the innovation processes and the impact that they generate on the companies of the sector and on the other hand to analyze in more detail the importance of the R&D figures on a formal way studying if there is any way that the benefits can be reflected in the short or medium term to stimulate the innovation in a permanent way in the sector.

Data Availability
e data used to support the findings of this research are available from the corresponding author upon request.  Advances in Civil Engineering 11