1. 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 45 units. The process time for each step is as follows:

Step	Time (in minutes)
Process Step 1	5
Process Step 2	8
Process Step 3	4
Process Step 4	3

The time required to move each batch between steps is 4 minutes. In addition, the time to move raw materials to Process Step 1 is also 4 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 6 minutes.

The new lean layout will allow the company to reduce the batch sizes from 45 units to 3 units. The time required to move each batch between steps and the inventory locations will be reduced to 2 minutes. The processing time in each step will stay the same. Determine the value-added, non-value-added, and total lead times, and the value-added ratio under the:

1. present and
2. proposed production approaches. (Round percentages to one decimal place.)