what is test strategy with example

Example: what is test strategy

Test strategy document gives a clear vision of 
what the test team will do for the whole project.
it is a high level document and
it is developed by project manager in our company.
It is a document which captures the approach on
how we go about testing the product and
achieve the goals. Test Plan is prepared
by keeping this document as base in our
company.

In Test Strategy Document there are 
different components like:
-Scope and overview
-Test Approach
-Testing tools
-Industry standards to follow
-Test deliverables
-Testing metrics
-Requirement Traceability Matrix
-Risk and mitigation
-Reporting tool
-Test summary