Quality is delighting customers
Test Plan document is a document which contains the plan for all the testing activities to be done to deliver a quality product. Test Plan document is derived from the Product Description, SRS, or Use Case documents for all future activities of the project.
It is usually prepared by the Test Lead or Test Manager.
As per software testing services a test plan is a document that describes the testing strategy, testing scope, testing objectives, testing required resources (software, test environment, manpower, hardware), test schedule with the estimate to complete test deliverables.
Test Plan includes the following items:
The test plan is a blueprint to achieve all the software testing activities as per defined processes with minimum monitoring and minimal controlled by the test manager.
As per my views,
Test Plan ; Test Plan is plan of action which is created by Test manager,Test lead where focus is on Timelines,Resources,Entry and Exit criteria,Strategy to follow to complete test,(Black box white Box ) Tools req will come under Test Plan.
Test Plan is project related (project wide)
Test Plan be One or two or multiples,
Test Plan can be changeable.
Test Strategy is organization wide term.
Strategy define by project manager, Team lead ,
Strategy we can not change easily.
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Test Plan is the instructions manual for your testing process. It describes the intentions of your project (why are you testing?), together with the high and sometimes low-level schedule of the activities you want to perform (how are you testing?).
Test plans can sometimes list the risks you foresee in the project (what are you testing for?), and they may also include things such as resources required (what are you going to be testing with?), and any other aspects that you may think are interesting or important to share about your testing approach.
A Software Test Plan is a document describing the testing scope, approach, resources, schedule, deliverable, communication, entry and exit criteria. It is the basis of formally testing any software/product in a project.
Test plan is a guideline based on which test execution should be tracked.
Below is very good article explaining Test Plan in details and also you can download a Sample Test Plan template