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Preemptive multi-skilled resource constrained project scheduling problem with hard/soft interval due dates
, Article RAIRO - Operations Research ; Volume 53, Issue 5 , 2019 , Pages 1877-1898 ; 03990559 (ISSN) ; Afshar Nadjafi, B ; Akhavan Niaki, S. T ; Sharif University of Technology
EDP Sciences
2019
Abstract
This paper considers a preemptive multi-skilled resource constrained project scheduling problem in a just-in-time environment where each activity has an interval due date to be completed. In this problem setting, resuming a preempted activity requires an extra setup cost, while each time unit violation from the given due date incurs earliness or tardiness penalty. Also, processing cost of each skill to execute any activity depends on the assigned staff member to accomplish the skill. The objective function of the model aims to minimize the total cost of allocating staff to skills, earliness-tardiness penalties and preemption costs. Two integer formulations are proposed for the model which...
A modified PSO algorithm for minimizing the total costs of resources in MRCPSP
, Article Mathematical Problems in Engineering ; Volume 2012 , 2012 ; 1024123X (ISSN) ; Kianfar, F ; Shirzadeh Chaleshtari, A ; Shadrokh, S ; Ranjbar, M ; Sharif University of Technology
2012
Abstract
We introduce a multimode resource-constrained project scheduling problem with finish-to-start precedence relations among project activities, considering renewable and nonrenewable resource costs. We assume that renewable resources are rented and are not available in all periods of time of the project. In other words, there is a mandated ready date as well as a due date for each renewable resource type so that no resource is used before its ready date. However, the resources are permitted to be used after their due dates by paying penalty costs. The objective is to minimize the total costs of both renewable and nonrenewable resource usage. This problem is called multimode resource-constrained...
An optimal procedure for minimizing total weighted resource tardiness penalty costs in the resource-constrained project scheduling problem
, Article Computers and Industrial Engineering ; Volume 62, Issue 1 , 2012 , Pages 264-270 ; 03608352 (ISSN) ; Khalilzadeh, M ; Kianfar, F ; Etminani, K ; Sharif University of Technology
Abstract
We present an optimal solution procedure for minimizing total weighted resource tardiness penalty costs in the resource-constrained project scheduling problem. In this problem, we assume the constrained renewable resources are limited to very expensive equipments and machines that are used in other projects and are not available in all periods of time of a project. In other words, for each resource, there is a dictated ready date as well as a due date such that no resource can be available before its ready date but the resources are permitted to be used after their due dates by paying penalty cost depending on the resource type. We also assume that only one unit of each resource type is...