Survey dataset on professional's perception on site supervision and project performance

Effective site supervision plays an important role in construction project delivery. This situates site supervisors in taking the responsibilities of coordinating and controlling all physical aspects of the day-to-day task in construction projects. A cross-sectional design approach was adopted by administering a well-structured questionnaire to selected built environment professionals. Descriptive statistics was performed on the data obtained and are presented on figures and tables. The data was also subjected to inferential statistics using Kruskal Wallis test to analyze the perceptions of respondents on effects of site supervision of construction works on completion time and quality respectively. The significance of the analyzed data is on identifying the effects of site supervision on project completion time and quality delivery. The analyzed data will also guide project stakeholders in selecting competent personnel in executing construction projects.


a b s t r a c t
Effective site supervision plays an important role in construction project delivery. This situates site supervisors in taking the responsibilities of coordinating and controlling all physical aspects of the day-to-day task in construction projects. A cross-sectional design approach was adopted by administering a well-structured questionnaire to selected built environment professionals. Descriptive statistics was performed on the data obtained and are presented on figures and tables. The data was also subjected to inferential statistics using Kruskal Wallis test to analyze the perceptions of respondents on effects of site supervision of construction works on completion time and quality respectively. The significance of the analyzed data is on identifying the effects of site supervision on project completion time and quality delivery. The analyzed data will also guide project stakeholders in selecting competent personnel in executing construction projects. &

Subject area
Building Construction More specific subject area Construction Management Type of data Google online form as generated and administered to selected built environment professionals in order to get their perception on the effects of supervision on construction projects.

Data source location
Lagos, Nigeria Data accessibility All the data are contained in this data article

Value of the data
The data reveal cogent roles of site supervisors in construction projects towards elimination of reworks, minimization of waste and ensuring conformity to standards.
The impacts of site supervision on project accomplishment of time and quality will be a contribution provided by the data.
The identification of the effects of site supervision will provide basics for local construction sector to equip themselves for future selection of site supervisors.
The data will also guide academia in fulfilling their teaching requirements hence producing competent hands that can handle construction works.

Data
A total of 78 online well-structured data instrument was administered to various built environment professionals comprising of Architects, Builders, Quantity Surveyors and Civil Engineers. The demographic features of the selected built environment professionals are presented in Fig. 1. The content of the designed instrument geared towards obtaining information on the perceptions of construction professionals on the effects of site supervision on construction projects. The data analysis uncovers the significant functions of site supervisors. In depth study of the data can provide insight into the roles performed by site supervisor in achieving project success of time and quality. Hypotheses were postulated which in turn lead to inferential statistics. The inferences drawn can inform the decision that inadequate site supervision can impair the timely completion and quality delivery of a construction projects. The data revealed top functions of site supervisor which include: Supervision and execution of the construction projects, Minimization of waste and elimination reworks on site, ensuring quality and standard conformity of materials and equipment, working with the purchasing procurement officer to ensure that materials are delivered in a timely manner to site to enable the contractor complete the works as scheduled and adhering to policies and procedures on site. Also possessing skills such as ability to monitor and control all assigned works, eliminating and resolving of disputes among workers and prompt reporting to the relevant project team member on the progress of and all material issues are relevant skills of site supervisor in ensuring timely completion and quality delivery of construction projects. The usefulness of this data is in its focus of project performance which has been a subject of debate among researchers and practitioners (Tables 1-5).

Experimental design, materials and methods
The collected data was based on the survey of selected construction practitioner's perception on the effects of site supervision on project completion time and quality delivery. Several literatures have reported similar accounts of the subject matter and can be found in [1][2][3][4][5][6][7][8][9][10]. The population of the data Avoidance of delay in any aspect of the project 4.29 .808 7 9 Ensuring that the site is safe for all workers 4.29 .841 7 10 Prompt estimating and allocating of resources required for the progress of the work 4.28 .754 10 11 Prevention of fines and interruptions from the regulatory bodies by complying with and enforcing relevance laws and codes. Systematic sampling technique was used in selecting 300 respondents from the population wherein the instrument was administered and returned via online google form. A total of 86 (28.7%) online questionnaires were returned out of which 8 were invalid. Evidence from literatures show that studies [11][12][13][14] have utilized survey design in assessing the impact of site supervision on construction projects. The responses were rated on a five-point Likert scale (1 ¼ strongly disagreed, 2 ¼ disagreed, 3 ¼ uncertain, 4 ¼ agreed and 5 ¼ strongly agreed) for effects of site supervision of construction