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Cost-Quality Trade Off

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Expert Systems with Applications 41 (2014) 1830–1846

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Expert Systems with Applications journal homepage: www.elsevier.com/locate/eswa

A new multi-objective multi-mode model for solving preemptive time–cost–quality trade-off project scheduling problems
Madjid Tavana a,b,⇑, Amir-Reza Abtahi c, Kaveh Khalili-Damghani d a Business Systems and Analytics Department, Lindback Distinguished Chair of Information Systems and Decision Sciences, La Salle University, Philadelphia, PA 19141, USA Business Information Systems Department, Faculty of Business Administration and Economics, University of Paderborn, D-33098 Paderborn, Germany c Department of Knowledge Engineering and Decision Sciences, University of Economic Sciences, Tehran, Iran d Department of Industrial Engineering, South-Tehran Branch, Islamic Azad University, Tehran, Iran b a r t i c l e

i n f o

a b s t r a c t
Considering the trade-offs between conflicting objectives in project scheduling problems (PSPs) is a difficult task. We propose a new multi-objective multi-mode model for solving discrete time–cost–quality trade-off problems (DTCQTPs) with preemption and generalized precedence relations. The proposed model has three unique features: (1) preemption of activities (with some restrictions as a minimum time before the first interruption, a maximum number of interruptions for each activity, and a maximum time between interruption and restarting); (2) simultaneous optimization of conflicting objectives (i.e., time, cost, and quality); and (3) generalized precedence relations between activities. These assumptions are often consistent with real-life projects. A customized, dynamic, and self-adaptive version of a multiobjective evolutionary algorithm is proposed to solve the scheduling problem. The proposed multi-objective evolutionary algorithm is…...

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