According to the PMBOK® Guide, the level of authority and the specific role of a project manager are heavily influenced by the Organizational Structure of the performing organization. PMI classifies matrix structures into three categories: Weak, Balanced, and Strong.

In a Weak Matrix organizational structure, the project manager maintains many of the characteristics of a functional organization.

Role Definition: The project manager ' s role is typically part-time. They often function more as a Project Expediter or Project Coordinator rather than a true manager.

Authority: Their authority is very low to non-existent. The functional manager retains most of the power, including control over the budget and resources.

Staffing: The project team members also work part-time on the project, with their primary loyalty and reporting line remaining with their functional department.

B. full-time: This is a characteristic of a Strong Matrix or a Projectized organization. In these structures, the project manager is a designated professional with a full-time commitment to the project and significant authority.

C. occasional: While a project manager in a weak matrix has limited hours, " occasional " is not a formal PMI term used to describe the role. The standard designation is " part-time. "

D. unlimited: This is incorrect in any organizational structure. All project managers operate within defined constraints of authority, budget, and schedule as outlined in the Project Charter.