1.1. Preprocessing Lead Time: A component of total lead time that represents the time required to release a purchase order or create a job from the time you learn of the requirement. You can manually enter preprocessing lead time for both manufactured and purchased items.
1.2. Processing Lead Time: The time required to procure or manufacture an item. You can compute processing lead time for a manufactured item, or manually assign a value. Processing lead time is computed as the time as total integer days required to manufacture 1 lead time lot size of an item. You must manually assign a processing lead time for purchased items. Processing lead time does not include preprocessing and postprocessing lead times.
For Manufacturing item processing lead time = fixed lead time + (variable lead time * lead time lot size)
1.3. Post Processing Lead Time: A component of total lead time that represents the time to make a purchased item available in inventory from the time you receive it. Manually enter post-processing lead time for each purchased item. Post-processing lead time for manufactured items is not recognized.
2.1. Fixed Lead Time: The portion of manufacturing lead time that is independent of order quantity. You can enter this factor manually for an item, or compute it automatically for manufactured items.
2.2. Variable Lead Time: The portion of manufacturing lead time that is dependent on order quantity. You can enter this factor manually for an item, or compute it automatically for manufactured items.
2.3. **Total Lead Time**: The fixed lead time plus the variable lead time multiplied by the order quantity. The planning process uses the total lead time for an item in its scheduling logic to calculate order start dates from order due dates.
3.1. Cumulative Manufacturing Lead Time: The total time required to make an item if you had all raw materials in stock but had to make all subassemblies level by level. Oracle Bills of Material automatically calculates this value, or you can manually assign a value.
3.2. Cumulative Total Lead Time: The total time required to make an item if no inventory existed and you had to order all the raw materials and make all subassemblies level by level. Bills of Material automatically calculates this value, or you can manually assign a value.
3.3. Lead Time Lot Size: The quantity you use to calculate manufacturing lead times. You can specify an item's lead time lot size to be different from the standard lot size.
4. Dynamic Lead Time Offsetting: A scheduling method that quickly estimates the start date of an order, operation, or resource. Dynamic lead time offsetting schedules using the organization workday calendar.
Imp Note
1. Oracle MRP/Master Scheduling considers preprocessing lead time when offsetting dates.
Oracle Bills of Material and Oracle Engineering do not consider preprocessing when computing manufacturing (processing) lead time.
2. Dynamic Manufacturing Lead Times (Fixed lead times, variable lead times and processing lead times) for manufacturing items are calculated by running the Manufacturing Lead Time GUI from Routing window.
Cumulative manf lead time and cumulative total lead times can be calculated by running Rollup cumulative lead times (Cumulative Lead Times for Report Set) request either from bill/Routing window.
For make item ASCP uses variable and fix lead time.
Both are coming from the routing:
Calculations Of Lead Time
Fix lead time: sum of resources scheduled and based on Lot
Variable lead time: sum of resources scheduled and based on Item
ASCP do: Lead Time = Fix Lead Time + Quantity * Variable Lead Time
Both lead time (fix and variable) can be calculated by a concurrent request
'Calculate Manufacturing Lead Times GUI' or entered directly.
'Calculate Manufacturing Lead Times GUI' or entered directly.
Cumulative Manufacturing: if all components are available, this time shows the time needed to build all the bom levels
Cumulative Total: if no components are available, this time shows the time needed to buy all components and to build all the bom levels
These lead times aren't directly used by ASCP for calculation. They are used to determine horizons.
Both can be calculated by a concurrent request 'Rollup Cumulative Lead Times GUI' , but 'Calculate Manufacturing Lead Times GUI' has to be launched before
