Compute Lead Time Isaacson Dental Inc. is considering a new lean product cell. The present manufacturing approach produces a product in four separate steps. The production batch sizes are 50 units. The process time for each step is as follows: Process Step 1 Process Step 2 Process Step 3 6 minutes 12 minutes 9 minutes Process Step 4 3 minutes The time required to move each batch between steps is 6 minutes. In addition, the time to move raw materials to Process Step 1 is also 6 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 50 units to 2 units. The time required to move each batch between steps and the inventory locations will be reduced to 1 minute. 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 (a) present and (b) proposed production approaches. If required, round percentages to one decimal place. Value-added time Non-value-added time Total lead time Value-added ratio (as a percent) Present Approach Proposed Approach 30 min 30 min 1,526 min 42 min 1,556 min 72 min 2 % 48.4 %