What is the triple constraint of a project?

The triple constraint of a project is a project management concept that describes the relationship between three key parameters:

• Time — project deadlines;
• Cost — project budget;
• Quality (or scope of work) — functionality and requirements for the result.

Changing one of these parameters inevitably affects the others. For example, if you reduce the time, you may need to increase the budget or decrease the scope of functionality. Managing the triple constraint helps balance customer expectations and team capabilities to successfully complete the project.