Improving Test Quality by a Test Type Analysis Based Method

This paper describes an easy adapted method of improving test coverage and effectiveness in an on-going industrial project by introducing and applying ´test type´ into test case design and execution. It presents comparison results of the number of system test item, effectiveness of test cases, and defect detection percentage between two increments in a real-world telecom project. It argues the importance of carrying out a test type analysis approach for test design, and proved a better test effectiveness (improved 5%) and DDP (improved 14%) can be performed by implementing the proposed approach. There was only a slightly increase of the budget after adapting the approach.