Testing Maturity Model (TMM)
Overview
Test Maturity Model (TMM) is a framework for assessing and improving the quality and effectiveness of software testing processes in a software organization. It was developed by the Illinois Institute of Technology and is based on the Capability Maturity Model (CMM) for software development.
Testing Maturity Model
It is a framework for evaluating the maturity of the test processes, helping to identify areas for improvement. The TMM consists of five levels of maturity, each with a set of goals, practices, and outcomes.
Levels of TMM
The TMM levels are as follows:
- Initial
- Defined
- Integration
- Management & Measurement
- Optimization/ Defect prevention and Quality Control
Initial
Testing is performed ad hoc, without any formal planning or documentation. There are no established standards or metrics for testing. Defects are often found late in the development cycle or after delivery. Testing is seen as a necessary evil, not as a value-adding activity.
Defined
Testing is planned and documented based on the requirements and design of the software. Test cases are designed and executed systematically, using appropriate tools and techniques. Test results are recorded and analyzed, and defects are reported and tracked. Testing is considered a quality assurance activity, not a quality control activity.
Integration
Testing is integrated with the software development process, from the early stages of requirements analysis to the final stages of deployment and maintenance. Testers are involved in all project phases, collaborating with developers, analysts, and users. Test processes are aligned with the business objectives and customer expectations. Testing is seen as a risk management activity, not a compliance activity.
Managed
Testing is managed as a separate process with goals, strategies, and resources. Test processes are measured and controlled using quantitative data and feedback. Test performance and quality are evaluated and improved based on predefined criteria and benchmarks. Testing is seen as a strategic activity, not as an operational activity.
Optimization
Testing is optimized as a continuous process focusing on innovation and learning. Test processes are adapted and customized based on the changing needs and characteristics of the software and the environment. Testers are empowered and motivated to experiment with new tools, techniques, and methods. Testing is seen as a competitive advantage, not as a cost factor.
The TMM provides a roadmap for achieving testing excellence by identifying the strengths and weaknesses of the current test processes, defining the desired level of maturity, and implementing the necessary actions to reach that level. The TMM can help organizations increase the quality, efficiency, and effectiveness of their software testing activities and ultimately deliver better software products to their customers.