A test plan is a thorough document that specifies the test strategy, aim, timetable, estimation, deliverables, and resources needed to accomplish software testing. The test plan aids in determining the amount of work required to validate the number of applications under test. The test plan serves as a blueprint for conducting software testing activities as a defined process that the test manager meticulously monitors and controls.
According to the ISTQB, a test plan document "describes the scope, strategy, resources, and timetable of expected test activities."
What Are the Benefits of a Test Plan?
Help people outside the test team such as developers, business managers, and customers to understand the details of testing.
The test plan guides our thinking. It is the rulebook, which needs to be followed.