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Purpose

The purpose of this WIKI is to explain to implement the source determination for a planned order or purchase requisition using a source list.

Overview

This WIKI will explain how to activate the automatic source of supply determination for external procurement(vendor selection) during the MRP run using source lists. It will also explain the most common causes for problems in this area and how to resolve such problems.

S/4 HANA

The information from this WIKI is not relevant for S/4 HANA, since the source determination logic was simplified. Refer to Note 2268069 - "S4TWL - Simplified Sourcing" for more information about the Simplified Sourcing for S/4 HANA.

 


Info Record:

The creation of the info record is a basic pre-requisite to activate the source determination during the MRP run. The creation of the info record tells the system that a specific material can be supplied by a vendor and it contains relevant MRP information, such as the planned delivery time.

The existence of an info record is not enough to allow the selection of the vendor by MRP, however, without an info record we cannot create a source list or a quota arrangement, which are the basis for the source determination.

The info record can be created on transaction ME11 and it is very important to ensure that the information from the tab Purchasing Organization Data 1 is completed.

Souce List:

The most simple way to activate the source determination during the MRP run is using a source list. The source list is checked in order to decide which sources of supply are valid and should be considered by MRP during the source determination.

A source list is created on transaction ME01 and the source of supply it will only be considered by MRP is the proper value is set for the field "Source List Usage in Materials Planning", as shown on the picture below:

Frequent issues on the source determination using a source list:

Problems with the source list validity:

The source list validity is checked against the requirement date, not against the date of the replenishment proposal. Therefore, if there is a rescheduling message with a date pointing to a period
outside of the source list validity, the source of supply will  not be selected.

 For example, considering the source list from the previous screenshot, we have the following MRP results:

Here, even though the first purchase requisition is within the source list validity, the vendor was not selected. That's because it was generated to cover a requirement from 08.05.2016, which is outside the source list validity. 

The following note provides more details about the system behavior:

 109380 - Add. info: Validity source list/quota arrangement for MRP

 "Fixed source of supply" indicator is not considered: 

The fixed source of supply indicator is not considered by MRP. This is the standard logic and the selection of a valid source of supply for MRP should be based on the "Source List Usage in Materials Planning" indicator, which is highlighted on the previous source list figure.

 The following note provides more details about the system behavior:

 110074 MRP: Source of supply, several valid source list records


Source of supply is not selected when using a special procurement: 

23035 No vendor from source list during spec. procurement

 

Related Content

SAP Note 109380: Add. info: Validity source list/quota arrangement for MRP

SAP Note 110074: MRP: Source of supply, several valid source list records

SAP Note 23035: No vendor from source list during spec. procurement

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