In SAP Materials Management, which purchasing documents allow only time dependent conditions to be maintained? Consider the following document types: A. Contract B. Purchase order C. Scheduling agreement D. Request for Quotation (RFQ) or quotation.

Introduction / Context:
In SAP Materials Management, pricing conditions can be maintained as time independent or time dependent, depending on the master data or document type. Outline agreements such as contracts and scheduling agreements provide central terms that can apply over a defined validity period and may use time dependent conditions. Understanding which purchasing documents support this feature is important for consultants who design purchasing processes. This question asks you to identify which document types allow only time dependent conditions.

Given Data / Assumptions:
- The document types considered are contracts, purchase orders, scheduling agreements and requests for quotation or quotations.
- Time dependent conditions are conditions that are stored with validity periods and can change over time.
- Outline agreements are used to store long term conditions with suppliers.
- The question asks specifically which documents allow only time dependent conditions, not time independent ones.

Concept / Approach:
In standard SAP, time dependent conditions in purchasing are typically used in outline agreements, namely contracts and scheduling agreements. These documents store long term pricing conditions that apply to many future call offs. Purchase orders and requests for quotation either copy conditions from master data or use time independent conditions maintained directly in the document. Therefore, when the question refers to purchasing documents that allow only time dependent conditions, it points to contracts and scheduling agreements, not to purchase orders or RFQs.

Step-by-Step Solution:
Step 1: Recall that outline agreements in SAP purchasing include contracts and scheduling agreements. Step 2: Remember that these outline agreements are used to store long term negotiated conditions with validity periods. Step 3: Recognise that time dependent conditions are appropriate for such long term agreements. Step 4: Understand that purchase orders and RFQs are transactional documents that usually use conditions copied from master data or entered as time independent conditions. Step 5: Select the option that lists contracts and scheduling agreements, that is, A and C, as the documents that allow only time dependent conditions.
Verification / Alternative check:
You can verify this by considering typical configuration steps in SAP. When defining condition types and access sequences for purchasing, you assign them to condition tables that are used in purchasing info records or outline agreements. Contracts and scheduling agreements then reference these conditions with validity dates. Purchase orders typically reference conditions from info records or outline agreements rather than exclusively holding time dependent conditions themselves. This reinforces that contracts and scheduling agreements are the correct answer.

Why Other Options Are Wrong:
The option listing contracts and purchase orders is incorrect because purchase orders do not exclusively rely on time dependent conditions and can contain time independent pricing. The option listing purchase orders and scheduling agreements is only half correct. The option that states all document types allow time dependent conditions is too broad and does not reflect standard SAP usage. The option that claims none of the documents support time dependent conditions contradicts common configuration practice in SAP purchasing.

Common Pitfalls:
A common pitfall is to assume that any document with a validity period must have time dependent conditions. However, the implementation of conditions is specific to document types and configuration. Another mistake is to treat purchase orders as equivalent to contracts, when in fact purchase orders are used for individual procurements, while contracts and scheduling agreements manage long term conditions. Keeping this distinction clear helps in both configuration work and exam questions.

Final Answer:
Only outline agreements support exclusively time dependent conditions, so only A and C (contract and scheduling agreement) allow time dependent conditions.