AReviewonMulticriteriaDecision Support Systemand Industrial Internet of Things for Source Code Transformation

School of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, China School of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China Department of Computer Science, University of Swabi, Swabi, Pakistan School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China Department of Computer Science and IT, University of Malakand, Malakand, Pakistan


Introduction
e expansion in the communications and increase of smart devices in the Industrial Internet of ings (IoT) has speedily empowered practitioners and researchers for making decisions according to several criteria. With the passage of time advancements in communication of diverse smart devices in network, rise in population Sensors, actuators, IoT, and others, size of data is increasing. Recent methodologies and approaches on the way to solving issues of the increase of data into diverse natures including value, volume, variety, velocity, and veracity, extracting significant information are challenging issues, DSS is furnished with the control of MCDSS for supporting the decisions maker in right decision in complex situations. Based on the success of MCDSS, practitioners and researcher are endeavouring to incorporate the control of intelligent decision-making for the available alternative [1][2][3].
DSSs are used in diversity of domains and applications for supporting the decision maker in taking right and appropriate decision. e DSS applications are evidenced in different areas of life. Such applications include the DSS in agriculture, business, energy, and so on [4][5][6][7][8][9][10][11][12][13][14][15]. Numerous domains and applications have explored methods and theories regarding decision-making for alternatives including from simple to advance, intelligent, and smart systems [16,17]. DSS is a dynamic field of research where studies find new approaches for evaluating various criteria, proposing frameworks which are intelligent and robust for improving the potentiality of DSS. Owing to the success of DSS in the process of decision-making, researchers are trying to provide more trustworthy, effective, and robust mechanisms for solving the current as well as the upcoming issues. MCDSS plays an important role in the process of decision-making for a particular situation based on diverse criteria. Decision-making based on multicriteria is the main issue for practitioners and researchers in the area of IIoT. Source code transformation is done for various purposes such as to optimize the efficiency of the source code, minimize the source code, and mostly to hide the identity of source code. Various preservation techniques are used for changing or modifying the source code [18][19][20][21][22]. Practitioners are mostly embedding the watermark or digital signature for protecting the identity and ownership of the source code. But due to the advancement of information technology, such watermark and digital signature can be removed. Several DSSs are available for making decisions which have the potentiality for supporting the activities of decisions-making and provide solutions for it. A comprehensive review of the existing approaches should be presented for showing the approaches, tools, and techniques practiced.
e proposed study presents an overview on the available decision support systems for IIoT which will enable practitioners and researchers to study the present methods, tools, approaches, and techniques and to provide novel solutions for the smooth industry of IoT. e study provides a comprehensive report of the existing approaches of DSS used for IIoT. e paper is organised as follows: Section 2 shows the related work of the existing literature to the proposed study and the approaches for Industrial Internet of ings.

Approaches for IIoT
Diverse solutions of approaches, techniques, methods, and tools of decision support systems are devised by researchers to tackle different situations of IIoT. ese solutions consist of dealing the problems from simple to more complex with various criteria of handling. Liu et al. [23] proposed a framework of IIoT cloud-fog hybrid network for data processing of industry. Based on the experimental results, it was revealed that the planned framework can reduce delay processing of industry data effectively. Sahal et al. [24] studied the strong point and flaws of open source technologies for big data and stream processing to setup its applications for use cases of industry 4.0. Khan et al. [25] offered the idea of IIoT in a novel manner for supporting readers to comprehend the IIoT. Studies presented for research in the area of IIoT are reported and shown. e research highly spots the empowering technologies for the IIoT and the issues to the IIoT. Gulati and Kaur [26] analysed the main opportunities assimilated from the idea of IoT into industry with suggesting reference architecture. A model of ontology was planned to propose the model from a semantic perception. For the relationship management, a method among industrial resources was offered.
Aceto et al. [27] elaborated the comprehensive explanation of the main approaches and technologies used in support of Healthcare 4.0, benefits, the key scenario applications, multidisciplinary issues, and the derivations. Rehman et al. [28] examined the existing technologies of big data analytics, algorithms, and strategies that can rapid the progress of perceptive IIoT framework. Important factors from the literature including applications of industrial analytics, types of analytics, analytics techniques, analytics tools, requirements, and sources of data were classified and characterised. e frameworks and case studies of the diverse accomplishments were reported that have turn a profit by BDA. Ordieres-Meré et al. [29] examined the functional properties and structure of cloud manufacturing and planned a business intelligent architecture for empowering dispensing pertinent KPIs recognized with intrigued process data with the support layer of dependability.
e authors [30] offered the concept of IoT data management, the literature associated with data IoT management, and the related way-out and identified challenges of open research.
Alexopoulos et al. [31] proposed the architecture of IIoT, and its detail of expansion to help the service of industrial product system life cycle. Mobile phone services are used as mobile computing in the IoT with mobile apps or through M-Health care system [32]. Younan et al. [33] offered a research with a wide-ranging analysis of the current issues in the literature and recommended the use of technologies for allowing the data study and search in upcoming IoT search engines. ey offered two case studies for showing encouraging development on intelligence and smartness of IoT presentations based on the incorporation of information and communication technologies. e smart phone applications were presented for the identification of patients' diseases in the fields of gynaecology and paediatrics [34]. Ge et al. [35] showed a report on the big data technologies in diverse IoT domains for enabling and motivating distribution of knowledge through the domains of IoT. e similarity and difference among the big data technology in dissimilar domain with the technology reusability in the IoT domain were presented. Souza et al. [36] proposed digital twin architecture design guidelines through the incorporation of existing technologies and IIoT.  Figure 1 depicts applications of DSS with studies in different areas. e proposed study is endeavoured to identify the areas of DSS from diverse perspectives including the type of publications, year of publication, title of publication, and so on. For the initial search process, the query ("multi-criteria") AND ("decision support system" OR "DSS") AND ("Industrial Internet of ings" OR "IIoT") was searched in the most popular libraries including ScienceDirect, Springer, IEEE, and ACM. Details of each library are given below. For ScienceDirect, the following information was gathered. Figure 2 represents the year-wise paper distributions with the amount of papers published. Figure 3 depicts publications titles with the total number of publications in the given library. From the figure, it is clear that the higher number of publications were done in the journal of Cleaner Production than in the journal of Future Generation Computer Systems followed by others. Figure 4 presents the subject areas with the total number of publications in given library. Figure 5 presents article types with the total number of articles. e figure reveals that the higher number of publications is research articles.

Analysis of the DSS for IIoT Based on Popular Libraries
Guo et al. [42] proposed an intelligent DSS on ground of technology of data mining-applied enterprises for establishing of IoT-based smart DSS for the industry of manufacturing. e system supports the decision makers in early decision-making. e experimental results of the study show that the proposed technique of mining technology can analyse the data from various perspective of classifying, clustering, and modelling huge volume of data and identify the correlation between data. Mashal et al. [43] proposed a hybrid approach of multicriteria decision-making which relay on the analytic hierarchy process and simple additive weight methods. e results of the study show that the application criterion is significantly important. e reliability, privacy, and availability were considered as the most crucial criteria of the applications of IoT.
After searching the library of ScienceDirect, the library of IEEE was searched in order to get significant information. Kashef et al. [44] proposed a tool of decision support for finding the cost optimum virtual machine settlement on multiclouds. e tool supports the model of cost estimation and optimization algorithm. Various simulations were done for examining the results achieved by the working of tool. Wan and Liao [45] proposed a coupling information system on ground of IoT and DSS exploring the research on the complete framework and design level of integration system. e authors [46] attempted for looking at the requirement of secure IIoT ecosystem in the standard of industry such as OpenFog consortium and industrial Internet consortium.  Scientific Programming e study discussed the future directions of research for enhancing the privacy, security, and safety of the IIoT. Different types of information were obtained in the library. Figure 6 presents publication topics with the articles published in the IEEE library. Figure 7 presents publications type with the total number of articles published in the given library. e figure depicts that the most number of paper types were conference followed by journal and then others.
e Springer library was part of the search process for obtaining the associated information. Sha et al. [47] proposed a system called IIoT-SIDefender which measures the degree of security of sensitive information with the support of the AHP and TOPSIS. Silva and Jardim-Goncalves [48] proposed an approach for analysing a set of hardware choices according to the user requirements based on multicriteria and advice on appropriate solution of hardware for a particular situation. Figure 8 depicts the types of contents with papers published. Figure 9 represents the discipline covered by given library with total number of papers.
e ACM library was considered as the relevant library for searching the associated information. Most of the IIoT   based on DSS approaches were considered as part of this library. e study proposed an intelligent approach for facilitating the daily life with the technology of IoT. e ecosystem based on the application of particular network protocol for facilitating the transporting operation [49]. An approach was proposed based on multisensing integrating diagnosis system for real-time and accurate monitoring of large-scale machinery. e approach endeavours capturing and modelling the temporal and spatial structure in sequential data and uses the mode-effective prediction of machinery [50]. Different types of information were gathered from the library of ACM. Figure 10 represents the total number of publications in given years with the total number of papers in the ACM library. Figure 11 depicts the content types with the papers published.

Internet of ings 22%
Production engineering computing 12%

Conclusion
DSSs are playing a significant role in every field of life. With innovation in technology and information communications, decision-making on right and appropriate time is a challenging issue for the industrial Internet of things. Taking decision on the right and appropriate time can ultimately lead the industry into success. Different libraries were searched in order to identify the applications and domain areas of DSS in various fields of the IIoT. Based on the search process, numerous studies were identified associated with the DSS based on multicriteria in the area of IIoT. e study has exploited the power of DSS as an efficient alternative for solving complex problems of the IIoT based on various criteria for source code transformation. e study has analysed the searched papers from different perspectives of the contributions achieved by researchers in the field. e presented study provides beneficial understanding to the readers and experts of the domain to know the current status of research in order to provide more intelligent and effective solutions to cope with more complex decision-making issues in the field of IIoT.

Data Availability
No data are available.