Practical Tool for Development of Non-Dominated Optimum Front in Time–Cost Trade-off analysis

Autor: M. K. Trivedi, Aditi Tiwari
Rok vydání: 2021
Předmět:
Zdroj: Journal of The Institution of Engineers (India): Series A. 102:1073-1088
ISSN: 2250-2157
2250-2149
DOI: 10.1007/s40030-021-00554-9
Popis: To overcome the limitations of critical path method (CPM) as a project network scheduling technique, various researchers have incorporated time–cost trade-off (TCT) to take care of the specified deadline and corresponding expenses. The results of an industry-wide questionnaire survey (Roofigari-Esfahan, N. (2011). Project Schedule Compression Considering Multi-objective Decision Environment (Doctoral dissertation, Concordia University).) revealed that despite the wide range of TCT analysis methods available in the literature; none of the respondents use these methods. The lack of specialized knowledge of mathematical modeling needed for defining objective function and constraint inequalities seems to be the main deterring in using these involved procedures. This necessitates developing a practical tool in the form of a simple user-friendly software capable of dealing with the rigor of optimization at the back end and entering a simple input at the front end. This paper presents a simple standalone software that requires input in the form of data defining the network precedence and activity time–cost relations. The objective function and constraints equations are automatically formed by the computer code and the mathematical model employing Linear/Integer programming is solved by an open-source solver integrated within the software itself. The program has been validated through implementing it on various case studies from the published literature. The implementation of developed software is illustrated with an example. The detailed results are then presented for a case study of small real-life project. The proposed software thus outweighs the current two stage procedure wherein a mathematical model is framed first and then some commercial solvers like Lingo (Zeinalzadeh in Aust. J. Basic Appl. Sci. 5:208–214, 2011), MATLAB are used to solve the model.
Databáze: OpenAIRE
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