Here’s a system test strategy template:
Product revision and overview
Features to be tested
Features not to be tested
Configurations included and excluded
System test approach
System test entry criteria
System test exit criteria
Other documents referenced
Describe the product and revision designator. Describe briefly how the product works. Reference other documents as needed.
Include a short history of previous revisions of this product that is three to four sentences. Include defect history. (The defect history will indicate the level of technical debt.)
List all features to be tested. ...