Describe role of a tester

May be a dev, a BA, a user, an SME. they analyse, review and assess requirements, user stories and acceptance criteria, specs and models for testability. reviews and contributes to test plans. designs and implements test cases and test procedures and creates test data. creates test execution schedule. executes tests, evaluates results, documents deviations from expected results. designs, setsup and verifies test environments. uses appropriate tools to facilitate the test process.