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 55 parts. A part requires 2 minutes in milling and 6 minutes in finishing. The move time between the two operations for a complete batch is 7 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 Philosophy||Lean Manufacturing Philosophy|
|Total lead time||min||min|
|Value-added ratio (as a percent)||%||%|
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