In project management, a temporary project can be:

According to the PMBOK® Guide (Project Management Body of Knowledge), the fundamental definition of a project is a temporary endeavor undertaken to create a unique product, service, or result. PMI clarifies the term " temporary " in the following ways:

Long in Duration (Option C): While a project is " temporary " (meaning it has a defined beginning and end), this does not mean it must be short. A project can last for several years (e.g., building a skyscraper or developing a new aircraft) and still be classified as temporary because it will eventually reach its conclusion.

Routine Business Process (Option B) / Ongoing (Option D): These options describe Operations. Operations are ongoing and repetitive (e.g., a manufacturing line or accounting services), whereas projects are unique and end when their objectives have been met or the project is terminated.

Completed without Planning (Option A): This contradicts all PMI standards. Every project requires a degree of planning (whether predictive/waterfall or adaptive/agile) to ensure that resources are used efficiently and objectives are met.

In the PMI framework, the temporary nature of a project indicates that the project team is disbanded and resources are reassigned once the project’s specific goals are achieved, regardless of how many years the project took to complete.