CalculateLead Time

Williams Optical Inc. is considering a new lean product cell. The present manufacturing approach produces a product in four separate steps. The production batch sizes are 63 units. Theprocesstime for each step is as follows:

Process Step 17minutesProcess Step 25minutesProcess Step 34minutesProcess Step 49minutes

The time required to move each batch between steps is 17 minutes. In addition, the time to move raw materials to Process Step 1 is also 17 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 17 minutes.

The new lean layout will allow the company to reduce the batch sizes from 63 units to 4 units. The time required to move each batch between steps and the inventory locations will be reduced to 3 minutes. The processing time in each step will stay the same.

Determine thevalue-added,non-value-added, and total lead times, and thevalue-added ratiounder the present and proposed production approaches. If required, round percentages to one decimal place.