Scope creep

Continuous or uncontrolled growth in a project's scope, at any point after the project begins

Scope creep in project management is continuous or uncontrolled growth in a project's scope, generally experienced after the project begins. This can occur when the scope of a project is not properly defined, documented, or controlled. It is generally considered harmful. It is related to but distinct from feature creep, because feature creep refers to features, and scope creep refers to the whole project.

This keyword could refer to multiple things. Here are some suggestions: