11 Work with Lead Times
This chapter contains these topics:
11.1 Working with Lead Times
Determining lead time is an essential part of any manufacturing or scheduling process. For any product that you purchase or manufacture, you encounter a time lag between when you order an item or start production and when you receive the item or finish production. To account for the lag, you must estimate the extra time and allow for it in your planning.
The system stores lead time information in the Bill of Material table.
11.1.1 What You Should Know About
| Topic | Description |
|---|---|
| Actual lead time | Actual lead times display the lead times as updated in the Branch/Plant table by the Leadtime Rollup program. |
| Calculated lead time | Calculated lead times display how many days you must start to manufacture a part prior to the need date of the parent. |
11.2 Reviewing Lead Times
From Daily Product Data Management (G30), choose Daily PDM Discrete
From Daily PDM Discrete (G3011), choose Leadtime Inquiry
You can review lead times to compare both actual and calculated lead times for an item.
On Leadtime Inquiry
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Complete the following required fields:
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Parent Item
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Branch/Plant
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Complete the following optional fields:
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Mode
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As Of
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The following fields display lead time information:
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Level
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Manufacturing
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Cumulative
11.2.1 What You Should Know About
| Topic | Description |
|---|---|
| Critical paths | If a component's cumulative lead time is greater than or equal to the parent item's lead time, the system highlights the Cumulative Leadtime field. |
11.3 Generating Lead Times
From any PDM menu (G30), enter 29
From Advanced PDM (G3031), choose Leadtime Rollup
You must generate lead times for the Material Requirements Planning and Capacity Requirements Planning systems. The Leadtime Rollup program calculates planned level lead times for manufactured items and updates them on Manufacturing Data in the Branch/Plant table. This program calculates:
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Queue and setup hours
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Lead time per unit
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Level, manufactured, and cumulative lead times for selected items
You cannot run this program in proof mode. It updates the records according to the data selection and processing options you choose. Plan your data selection carefully, because changes to lead times will affect the Materials Requirements Planning and Capacity Requirements Planning systems. You can update new items by entering them separately in the data selection.