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In this study, a Tabu Search (TS) approach to the parallel machine scheduling problem is presented. The problem considered consists of a set of independent jobs to be scheduled on a number of parallel processors to minimize total tardiness. Several surveys on parallel machine scheduling with due date related objectives [1, 2, 3] reveal that the NP-hard(More)
This paper exploits the interactions between the machine scheduling and the scheduling of Material Handling System in a given Flexible Manufacturing System (FMS) layout with an objective of minimization of makespan and to study the overall feasibility of generation of optimal simultaneous schedules. A heuristic scheduling algorithm is developed which takes(More)
In this study, a tabu search (TS) approach to the single machine total weighted tardiness problem (SMTWT) is presented. The problem consists of a set of independent jobs with distinct processing times, weights and due dates to be scheduled on a single machine to minimize total weighted tardiness. The theoretical foundation of single machine scheduling with(More)
This paper introduces a multi-project problem environment which involves multiple projects with assigned due dates; activities that have alternative resource usage modes; a resource dedication policy that does not allow sharing of resources among projects throughout the planning horizon; and a total budget. Three issues arise when investigating this(More)
Multi-project scheduling problems are characterized by the way resources are managed in the problem environment. The general approach in multi-project scheduling literature is to consider resource capacities as a common pool that can be shared among all projects without any restrictions or costs. The way the resources are used in a multi-project environment(More)
A new technique for sacrospinous ligament fixation, which allows rapid and safe suture placement and automatic suture retrieval, is described and compared with Deschamps ligature carrier. Sacrospinous ligament fixation was performed by Deschamps ligature carrier over 30 patients and the new procedure was applied over 27 patients. Patients were evaluated(More)
Manufacturing flexibility is a competitive weapon for surviving today’s highly variable and volatile markets. It is critical therefore, to select the appropriate type of flexibility for a given manufacturing system, and to design effective strategies for using this flexibility in a way to improve the system performance. This study focuses on full routing(More)
The characterization of the way resources are used by individual projects in the multi-project environment is called resource management policy in this study. The common resource usage approach in multi-project scheduling literature allows the sharing of resources without any restrictions or costs among projects. An extension is proposed Krüger and Scholl(More)