Question

Calculate Lead Time 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 50 parts. A part requires 3 minutes in milling and 9 minutes in finishing. The move time between the two operations for a complete batch is 10 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 6 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 Lean Manufacturing Philosophy Philosophy Value-added time min min Non-value-added time min min Total lead time min min Value-added ratio (as a % % percent)

Answer 1

ANSWER

	Traditional Philosophy	Lean Manufacturing Philosophy
Value-added time	3+9 =12	3+9 =12
Non-value-added time	12*(50-1)+10=598	12*(4-1) =36
Total lead time	598+12=610	12+36=48
Value-added ratio (as a percent)	12/610*100 = 1.96%	12/48*100=25%

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