Michigan Machining Company machines metal parts for the automotive industry. Und
ID: 451904 • 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 80 parts. A part requires 3 minutes in milling and 8 minutes in finishing. The move time between the two operations for a complete batch is 9 minutes.
Under the lean manufacturing 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 3 parts and the move time is eliminated.
Determine the value-added, non-value-added, and total lead times, and the value-added ratio under the traditional and lean manufacturing methods. If required, round percentages to one decimal place.
Traditional Philosophy Lean Manufacturing 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
Value Added time in both Traditional and Lean Philosophy = 3 + 8 minutes per unit
Non-Value Added time in Traditional philosophy = 9 / 80 per unit = 0.11 minutes per unit
Non-Value Added time in Traditional philosophy = 0 / 3 per unit = 0 minutes per unit
Traditional Philosophy Lean Manufacturing Philosophy Value-added time 11 min 11 min Non-value-added time 0.11 min 0 min Total lead time 11.11 min 11 min Value-added ratio (as a percent) 99.0% % 100.0% %