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Unformatted text preview: be greater than the savings from the resulting increase in P. The location of the knee of the curve is related to the MTTR of the two machines. It will be somewhere around (small integer)MTTR, where a greater variance of MTTR leads to a bigger integer number. If the first machine is slower (e 1 <e 2 ), the average number of parts in the buffer ( n ) will be small (see right figure on slide 43). Therefore the buffer size is determined by the need to keep machine 1 running while machine 2 is down (the buffer has to be big enough to absorb the output of machine 1 for the downtime of machine 2). For a smaller r 2 (big MTTR 2 ) a bigger buffer is needed. If the second machine is slower (e 1 >e 2 ), the buffer has to be large enough to provide the parts to keep machine 2 running while machine 1 is down (N (small integer)MTTR 1 ). Increasing the buffer size further increases the average number of parts in the buffer without adding any value....
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- Spring '04