Evaluation of Operational Complexity for Flexible Manufacturing System Under Considering Dispatching Strategies

• Main Authors: Dong-Ying Hsieh, 謝東穎
• Other Authors: Ming-Shan Lu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/06905501988065874858

碩士 === 國立雲林科技大學 === 工業工程與管理系 === 102 === Flexible manufacturing systems can deal with uncertain incidents because of their flexibility in. machines, routers, scheduling, etc. and usually can dispatch the jobs according to differing dispatching rules. In general, the performance evaluation for dispatching rules only considers some factors related to time and quantities, such as due dates, average cycle times and utility rate. However, the use of dispatching rules may cause some uncertainties such as the length of waiting lines or the states of resources. These uncertainties may result in management difficulties and thus, they should also be considered while selecting an appropriate dispatching rule. Operational complexity that is based on information entropy is usually used to measure uncertainties of systems. Therefore, in this research, the operational complexity with information entropy is introduced as a performance indicator to evaluate the performance of production systems under different dispatching rules. In addition, a statistical method is used to find out whether there are correlations between operational complexity and other general performances. Accordingly, the information from these correlations can has better understanding the specialties of every dispatching rule and can provide planners with better decision making for selecting dispatching rules.