An auditor is external to the project and offers an independent objective view of a project and its processes. The tendency for some organizations is to have this function serve as "process police." Following the team of peers mindset, this function should be more of a "process coach," with the initial assumption that everyone wants to do the right thing. An auditor effectively advocates and communicates for the product management constituency in the MSF Team Model by auditing the product and its processes and facilitating corrective action. The auditor is responsible for assessing the quality in the product as measured by quality control and the quality assurance measured as conformance against process definition. An auditor reports variance from specification, variance from plan, and variance from process definition. An auditor's reports can be used to assess the likely quality of the product and whether or not the organization exhibits control in its operations.

A person assigned to this role should be added to the Contributor permissions group. This allows them to do all that they need to perform their function; such as create and modify the documents, work items, and work products.