| Summary: | 碩士 === 國立交通大學 === 工業工程與管理系 === 87 === A machine-mix configuration denotes a factory capacity implementation plan which describes the number of machines and machine types for the factory. Determining machine-mix configuration is a very important problem for an IC foundry because the machines are quite expensive. Most previous studies on machine-mix configuration focus on developing methods for maximize throughput under budget constraints. In an IC foundry, short cycle time is a very important justification criterion, yet rarely included in previous relevant studies.
The objective of this research is to develop a decision-making mechanism for designing the machine-mix configuration for an IC foundry. The input to the decision-making mechanism involves (1) product mix or demand pattern; (2) throughput constraint or the lowest production output rate; (3) cycle time constraints or the longest mean cycle time. The output tends to give a set of machine types and corresponding machine numbers which would satisfy the above two constraints in producing the given product mix, under the criterion of minimizing total investment.
A basic design method together with four embellishments have been developed and tested. Testing results show that among the four proposed machine-mix configurations, the difference between the best and the worst solutions can be around 10 Million US dollars.
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