Abstract
In this paper, a new approach is used in solving a combination of problems in group classification of parts and machine tools and layout. Factories producing a large-variety of small quantity batches is discussed. Instead of taking into consideration of the numerous combinations existing in grouping the parts and machines, this method is based on a practical procedure to choose sub-optimal grouping and an optimizing technique in layout planning. A typical example of this type of factory was examined and the results from the analysis revealed the following:(1) By introducing grouping and optimum layout, it is possible to reduce the machining cost and transportation cost by as much as 14.6%.(2) Generally, group classification and layout can be conducted, a) considering the minimization of machining cost alone, b) for the group of multiple organized machines by minimizing the sum of machining and transportation costs after first performance of the procedure a). So a similar result can be obtained to that of procedure (1).(3) For line layout, a practical technique is developed and compared with the results of Branch and Bound method, resulting in coincidence with the optimum solution so far as problem where the method is of practical applicability within 10 machines are concerned.
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