Which indicator can you set for manual source assignment in the 'function authorizations for buyers' user parameter (EFB) in SAP Materials Management?

The indicator that can be set for manual source assignment in the 'function authorizations for buyers' user parameter (EFB) is related to the type of procurement documents involved. In this case, the correct answer is the Contract.

Contracts in SAP MM represent long-term agreements between a buyer and a supplier and are often linked to sourcing processes. By setting the EFB parameter for Contracts, the designated buyer is authorized to manually assign sources for these procurement items, allowing for flexibility in fulfilling purchasing needs and ensuring that agreements established with suppliers are adhered to. This functionality is particularly useful in scenarios where specific conditions or terms set out in the contract must be taken into consideration when performing manual source assignments.

In contrast, other options such as Purchase Requisition, Source List, and Quotation typically engage in different processes or require less manual intervention in terms of source assignment as part of their standard procedures. They might not provide the same level of authorization flexibility as the Contracts when it comes to manual source assignment.