Flint Fabricators Inc. machines metal parts for the automotive industry. Under t
ID: 3161881 • 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 30 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 5 minutes.
Under the lean 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 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
Traditional philosophy Value added time Non Value added time Total time Processing time (5 minutes + 7 minutes) 12 12 Within batch waiting time 12 minutes*(30-1)parts 348 348 Move time 5 5 Total 12 353 365 Value added ratio = 12 minutes/365 minutes = 3
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