Testing Maturity Model: TMM in Software Testing

Created by: Igor Kovalenko, QA Team Lead and Mentor, TMMi expert. Sasha Baglai, Content Lead.

Summary: A 2025 guide to implementing the testing maturity model (TMM) framework to assess your current testing processes and systematically improve from reactive chaos to predictable, scalable quality control.

Best for: CTOs, QA managers, development team leads, engineering managers, QA engineers, DevOps engineers, software architects.

Your testing process is either helping you ship faster or holding you back. There’s no middle ground.

Most teams test like they’re putting out fires. Something breaks, they write a test. A release fails, they add more checks. Then they wonder why every deployment feels like a gamble.

Mature testing works differently. You know exactly what will break before it breaks. Your releases ship on schedule because quality is built in, not bolted on afterward.

The difference? Systematic processes that work the same way across every team and project.

Here’s what changes when testing becomes mature:

Delivery becomes predictable. You stop padding estimates for “testing time” because you know your processes will catch problems before they become blockers. Release planning…