Flint Fabricators Inc. machines metal parts for the automotive industry. Under t
ID: 429524 • Letter: F
Question
Flint Fabricators Inc. 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 45 parts. A part requires 6 minutes in milling and 8 minutes in finishing. The move time between the two operations for a complete batch is 5 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 4 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 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
Traditional Philosophy Just In Time
Value added time 1 min 4 min
Non value added time 5 min 4 min
Total lead time 6 min 6 min
Value added ratio(%) 50 % 55%
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