Planning product-mix, machine loading and scheduling in multi-stages production of wire ropes | |
| Author | Sukhum Dechawongsuwan |
| Call Number | AIT Thesis no. IE-88-09 |
| Subject(s) | Wire-rope industry Scheduling (Management) |
| Note | A Thesis Submitted in Partial Fulfilment of the Requirements for t he Award of the Degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. IE-88-09 |
| Abstract | Wire rope production was multi-stages production which work in process stored on bobbins. Production route could be changed according to machines condition. In this study, company facing many problems from improper scheduling which led to bobbin shortage and machines waiting time problem. Thus, company could ut111ze only 20-30% of it's capacity only. The planning and scheduling problem couldn't be solved by the existing methodology. Therefore, the author developed new methodology for solving the problem. The problem was solved by two level hierarchical approach. In level 1. a heuristic procedure for loading and scheduling was developed. The criteria for the procedure were given on profit and alternate machines capacity. In level 2, the policy for scheduling was developed to schedule job from level one. There are two policy for scheduling. First, policy to schedule stranding machines with is bottleneck. Priority was given to job with the longest expected processing time(stranding processing time + expected waiting time). Second, policy for scheduling closing machines in order to reduce work in process. In this policy, priority was given to work in process from operation with give the highest bobbin free rate {work in process (in term of number of bobbins)/(set up + processing time.)I. Two months orders were experimented. Results were discussed together with some recommendation for further study. |
| Year | 1988 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. IE-88-09 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Industrial Engineering (IE) |
| Chairperson(s) | Awate, Prakash G. ; |
| Examination Committee(s) | Fujiwara, Okitsugu ;Oudheusden, Dirk L. van ; |
| Scholarship Donor(s) | The Government of Belgium; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |