Consider a #exible #ow shop with s stages in series and at each stage a number of identical machines in parallel. There are n jobs to be processed and each job has to go through the stages following the same route. Job j has release date r H , due date d H , weight w H and a processing time p HJ at
Minimizing total weighted completion time in a proportionate flow shop
β Scribed by Natalia Shakhlevich; Han Hoogeveen; Michael Pinedo
- Publisher
- Springer US
- Year
- 1998
- Tongue
- English
- Weight
- 127 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1094-6136
No coin nor oath required. For personal study only.
β¦ Synopsis
We study the special case of the m machine flow shop problem in which the processing time of each operation of job j is equal to p H ; this variant of the flow shop problem is known as the proportionate flow shop problem. We show that for any number of machines and for any regular performance criterion we can restrict our search for an optimal schedule to permutation schedules. Moreover, we show that the problem of minimizing total weighted completion time is solvable in O(n) time.
π SIMILAR VOLUMES
We consider a job shop with m machines. There are n jobs and each job has a speciΓΏed sequence to be processed by the machines. Job j has release date rj, due date dj, weight wj and processing time pij on machine i (1; : : : ; m). The objective is to minimize the total weighted tardiness of the n job
We present a shifting bottleneck heuristic for minimizing the total weighted tardiness in a job shop. The method decomposes the job shop into a number of single-machine subproblems that are solved one after another. Each machine is scheduled according to the solution of its corresponding subproblem.