Compute Lead 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 45 units. The process time for each step is as follows: Process Step 1 Process Step 2 Process Step 3 Process Step 4 5 minutes 8 minutes 4 minutes 3 minutes The time required to move each batch between steps is 5 minutes. In addition, the time to move raw materials to Process Step 1 is also 5 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 5 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.

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**Compute Lead 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 45 units. The process time for each step is as follows:

- **Process Step 1:** 5 minutes
- **Process Step 2:** 8 minutes
- **Process Step 3:** 4 minutes
- **Process Step 4:** 3 minutes

The time required to move each batch between steps is 5 minutes. In addition, the time to move raw materials to Process Step 1 is also 5 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 5 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 present and proposed production approaches. If required, round percentages to one decimal place.**

|                             | Present Approach | Proposed Approach |
|-----------------------------|------------------|-------------------|
| Value-added time            |                  |                   |
| Non-value-added time        |                  |                   |
| Total lead time             |                  |                   |
| Value-added ratio (as a percent) |          |                   |

**Explanation:**

The text is accompanied by a table meant to calculate different aspects of lead time: value-added time, non-value-added time, total lead time, and value-added ratio for both current and proposed methods.

- **Value-added time**: Time spent directly contributing to manufacturing.
- **Non-value-added time**: Time spent on other activities, such as moving products.
- **Total lead time**: Sum of value-added and non-value-added times.
- **Value-added ratio**: Percentage of value-added time over total lead time. 

Note: Calculations are required to complete the table based on process improvements described.
Transcribed Image Text:**Compute Lead 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 45 units. The process time for each step is as follows: - **Process Step 1:** 5 minutes - **Process Step 2:** 8 minutes - **Process Step 3:** 4 minutes - **Process Step 4:** 3 minutes The time required to move each batch between steps is 5 minutes. In addition, the time to move raw materials to Process Step 1 is also 5 minutes, and the time to move completed units from Process Step 4 to finished goods inventory is 5 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 present and proposed production approaches. If required, round percentages to one decimal place.** | | Present Approach | Proposed Approach | |-----------------------------|------------------|-------------------| | Value-added time | | | | Non-value-added time | | | | Total lead time | | | | Value-added ratio (as a percent) | | | **Explanation:** The text is accompanied by a table meant to calculate different aspects of lead time: value-added time, non-value-added time, total lead time, and value-added ratio for both current and proposed methods. - **Value-added time**: Time spent directly contributing to manufacturing. - **Non-value-added time**: Time spent on other activities, such as moving products. - **Total lead time**: Sum of value-added and non-value-added times. - **Value-added ratio**: Percentage of value-added time over total lead time. Note: Calculations are required to complete the table based on process improvements described.
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