What is the difference between “mandatory” and “discretionary” sources of supply in FAR?

The distinction between "mandatory" and "discretionary" sources of supply is critical in Federal Acquisition Regulation (FAR) practices. Mandatory sources must be utilized when they are available, as they represent established sources that have been designated for use by federal agencies to fulfill their needs. This could include government supply sources or particular organizations that Congress or Federal regulations have directed agencies to use, ensuring efficient use of taxpayer dollars and consistent procurement practices.

In contrast, discretionary sources provide agencies with the flexibility to choose suppliers based on their specific needs, preferences, or circumstances. While agencies can opt to use discretionary sources, they are not obligated to do so when a mandatory source is available. This allows for a broader range of purchasing options when the mandatory sources do not meet an agency's requirements for quality, uniqueness, or other considerations.

Understanding this distinction is essential for compliance with FAR guidelines and ensuring that procurement processes align with federal policies on supply sourcing.