| Pull forecast schedules |  |
| A pull schedule of the type forecast is a non-referenced schedule that can only be generated by Enterprise Planning and that cannot be created manually. Based on the parameters and triggers, the following steps are completed: Step 1. To generate a schedule header and lines ERP LN generates a schedule header in the Purchase Schedules (tdpur3110m000) session and schedule lines in the Purchase Schedule - Lines (tdpur3111m000) session. Before a pull forecast schedule can be automatically generated by Enterprise Planning, the following information is exchanged between Enterprise Planning and the Purchase Control module: Determination of supplier To determine a supplier, the following steps are completed: Enterprise Planning sends the required item (group) and warehouse to Purchase Control. Purchase Control searches for approved suppliers based on the priority levels defined on the Buy-from BP Search Schedules tab of the Purchase Contract Parameters (tdpur0100m300) session. Purchase Control sends all valid business partners to Enterprise Planning, after which Enterprise Planning selects a supplier. For more information, refer to: To select external suppliers To select internal suppliers Determination of requirement dates To determine requirement dates, Enterprise Planning carries out lead time offsetting. To carry out lead time offsetting, Purchase Control must generate planned delivery moments far enough in the future in the Generate Planned Delivery Moments (tdipu0225m000) session. The generated planned delivery moments are stored in the Planned Delivery Moments (Shipment Based) (tdipu0125m000) session or the Planned Delivery Moments (Delivery Based) (tdipu0126m000) session, from which they can be called on by Enterprise Planning. For more information on planned delivery moments, refer to To use planned delivery moments. Determination of supply ERP LN can generate schedule lines dependent on a number of constraints. For more information on these constraints, refer to: Constraints for generating non-referenced purchase schedule lines Purchase schedules and Enterprise Planning ERP LN only generates a new schedule if Enterprise Planning does not find an existing push schedule for a combination of item, buy-from business partner, ship-from business partner, and purchase office. Although you cannot manually create pull forecast schedules, you can update an active pull forecast schedule in the Purchase Schedules (tdpur3110m000) session provided the schedule's linked release type is not Sequence Shipping Schedule, and no schedule lines exist yet. Step 2. To regenerate schedule lines Schedule lines must be regenerated in the Regenerate Schedules (tdpur3211m000) session. For pull-forecast schedules, regeneration is only performed to retrieve the correct segment set, pattern code, and buyer for the purchase schedule. For more information on using segment sets when regenerating purchase schedule lines, refer to To use segment sets. Step 3. To generate a purchase release The Generate Release Lines (tdpur3222m000) session is used to perform the following actions for Material Release and/or Shipping Schedule: Generate purchase release lines, which are displayed in the Purchase Release - Lines (tdpur3121m000) session. Cluster schedule lines, which are displayed in the Purchase Release Line - Details (tdpur3522m000) session. For more information on: Purchase releases, refer to Purchase releases. Custering, refer to To cluster purchase schedule lines. Step 4. To approve the purchase release The purchase release must be approved in the Approve Release Lines (tdpur3222m100) session. Step 5. To print the purchase release The purchase release must be printed in the Print Purchase Releases (tdpur3422m000) session. If the Communication Channel field in the Purchase Contract Line Logistic Data (tdpur3102m000) session and/or the Items - Purchase Business Partner (tdipu0110m000) session is set to EDI and the Release EDI Message Directly check box is selected in these sessions, you need not print the purchase release in the Print Purchase Releases (tdpur3422m000) session. ERP LN automatically prints the purchase release. Step 6. To insert authorizations Authorizations are inserted in the FAB/RAW Authorizations (tdpur3534m000) session. Pull forecast schedules use the required cumulatives from the pull call-off schedule to calculate fab authorizations and raw authorizations. For more information, refer to Authorizations. Step 7. To generate a pull call-off schedule A pull call-off schedule must be generated. For details on pull call-off schedules, refer to Pull call-off schedules. Related topics To select external suppliers To select internal suppliers To use planned delivery moments Constraints for generating non-referenced purchase schedule lines Purchase schedules and Enterprise Planning To use segment sets Purchase releases To cluster purchase schedule lines Authorizations Pull call-off schedules Overview of purchase schedule handling |