5.1 Recommendation
5.1.1. Decision Support System
A decision support system is a computerized tool that helps increase the effectiveness of the decision-making process for semi-structural tasks. The tools and technology are used to support the decision-making rather than replacing the management judgment. The decision-making process promotes objectivity and neglects subjectivity, and increases the decision-making speed. (Hastak, 2018)
The decision-making model for increasing the profitability in the construction project is
1.Choosing the profit-maximizing objectives
2. Impacts of the decisions on the entire project and to consider all the possible situations
3.Filtering the selection criteria, which is quantifiable for the decision points
4.Establishing the probability of achieving the events in the decision criteria
5.Practicing the possible result for the decision alternatives and simulating the action combination, if any new event occurs
6.Final decision is made – maxim rule can be used.
The decision support is shortlisted from the literature review for the five rules and responsibilities of the commercial manager. The shortlisted decision system will enable the data-driven decision-making process to increase the project's profitability and success rate.
Table 6 Comparison of Decision-making tools used in the literature review
5.1.2. Cost Information
The cost information considered while making the decision is very crucial. Only the relevant cost related to the decision-making should be considered because not all the costs will form the basis. During the prerendering stage, there will be much ambiguity in the cost information, so as the design development occurs, the accuracy of cost information increases. The cost information will be relevant only when developed at the right time for the commercial maker to make an accurate and satisfactory decision. The different costs like an additional cost, differential cost, avoidable cost should be identified before taking the decision. "The distinguish of costs like reversible or irreversible, The controlled cost and the administrated one, Determined costs and discretionary costs, visible costs and hidden costs, n internal and external cost. From this brief overview upon costs results that authority of the decision-maker is limited to all internal costs, manageable ones. It will be obvious on costs, reversible and determined. On the other hand, the decision-maker influences only very little on administration costs and outsourcing" (Lepădatu, 2017)
The source of cost information may be derived from the database of similar projects, competitive rates, arrived rm the economic and technical reports, or cost calculated from the same operating budgets. The digitalization of the workforce will enable an ample amount of data for the projects, and only the relevant cost should be considered. The cost behavior and relevance should be considered to choose the correct source for cost information.
5.1.3. User interference
The user interference should be designed before the central pretending process to be started. The creator of the user interference should clearly understand the user characteristics and the requirement and provide various design options to the users to provide effective usage and control of the functions in the system. (scholarworker , 2016) The user interference consists of model management and data management system to be connected for the smooth working of the decision support system. "The guidelines for designing the user interface include Strive for consistency, provide shortcuts for frequent users, provide informative feedback, design dialogs to create a closure, provide simple error recovery, permit easy reversal of actions, support internal locus of control, reduce information load proposed by Ben Schneiderman. He also listed uniformity of commands and interface, adaptability, execution time, versatility, quality of help provided, learning time for the DSS, ease of recall, fatigue as the factors that affect the success of user interfaces ." (scholarworker , 2016)
The user interference may be enabled to access the data from the web browser, dashboard, simulation software, and accessing the other customized gateway to software r structured programs customized gateway. The main functions include preparing the data query from the ample data available and help the commercial manager to select the best alternative after the analyses. The number of quires raised and successful completion of the raised quires using the data, model management, and user interfaces defines the effectiveness of the decision proposed by the DSS.
The benefits of the well-designed user interfaces include processing speed, increased productivity, reduction of errors, and human judgemental decision making, increasing the accuracy of the decision made by the DSS.
5.1.4. Knowledge Building
For the repetitive decision made in the project, the information and documents needed for the decision-makers shall be easily identified by the knowledge management process. The knowledge related to the project and the external environment is stored in a structured way, organized, and managed through the software to retrieve the required information quickly. Knowledge management forms the database for the decision support system and knowledge base management for future projects.
The data mining and the big data can be integrated with the DSS for data classification, clustering, and analysis purpose. The synergy between the decision support system and KM is discussed and elaborated in the Group System Support. "The GSS supports the group function like model management, data mining, idea evaluation, communication facilities, and dashboards. The research will establish a link between intreating knowledge management, strategic management, and the DSS to enable the business to gain a competitive advantage to achieve the business objectives.
5.2 Conclusion
The roles and responsibilities of the commercial manager differ across the type of organization. The questionnaire survey and literature review are done to identify the primary role and responsibility of the commercial manager. Cost management, performance management, value management, risk management, and contract formulation are the primary roles and responsibilities in the pre tendering stage. The interview has been conducted to identify the decision checkpoints in the prioritized roles and responsibilities of CM. The summary of the decision checkpoints [5.2 Objective 2]and their impacts on the project cost and the profitability are elaborated.
The decision-making process has evolved into data-driven, promotes greater collaboration, and involves more stakeholders by digitalizing the workforce. The decision support system should support the decisions made by the commercial manager to enable an increase in profitability. It helps make efficient and take faster decisions by making available relevant cost information and prediction at the right time to the commercial manager. The significant outcome of the research paper is the study of the impact of the decision made by the CM and the decision support system with synergies between the four attributes like decision model, knowledge management, cost management, and user interference to increase the profitability and to establish the group system support which consists of data mining, model management to analyze the big data available from the construction site.