The Test Plan (TP) is designed to prescribe the scope, approach, resources, and schedule of all testing activities. The plan must identify the items to be tested, the features to be tested, the types of testing to be performed, the personnel responsible for testing, the resources and schedule required to complete testing, and the risks associated with the plan.
A Test Plan must grow around a element that is the most important element of test, the element that more undergoes the modify from developers. We must check other elements that could be influenced from this change.
So we create a combination of these variables, for example with pict tool, and we are ready to execute each test case of our test plan.
Can be added a graph to explain better the situation during the test (Remaing Tests %, OK Tests %, KO Tests %, Blocked Tests %).