Michigan Machining Company machines metal parts for the automotive industry. Und
ID: 2344468 • Letter: M
Question
Michigan Machining Company machines metal parts for the automotive industry. Under the traditional manufacturing approach, the parts are machined through two processes: milling and finishing. Parts are produced in batch sizes of 60 parts. A part requires 5 minutes in milling and 7 minutes in finishing. The move time between the two operations for a complete batch is 10 minutes.Under the just-in-time philosophy, the part is produced in a cell that includes both the milling and finishing operations. The operating time is unchanged; however, the batch size is reduced to 5 parts and the move time is eliminated.
Determine the value-added, non-value-added, total lead time, and the value-added ratio under the traditional and just-in-time manufacturing methods. If required, round percentages to one decimal place.
Traditional Philosophy Just-in-Time Philosophy
Value-added time ______________ min ________________ min
Non-value-added time ______________ min ________________ min
Total lead time ______________ min ________________ min
Value-added ratio (as a percent) ______ % ______ %
Explanation / Answer
Just in time Lead time=60*(5+7)=720min Non-value-added time=720+(60*10)=720+600=1320min value added time=720+(55*10)=1270 value added ratio=1320/1270=103.93%