Which test process improvement model consists of five maturity levels?

Test Process Improvement Models:

TMMi® (Test Maturity Model Integration)has five maturity levels: Initial, Managed, Defined, Measured, and Optimization.

Other models, likeTPI® NEXT, focus on key areas but do not use a maturity-level framework.

CMMi® (Capability Maturity Model Integration)applies broadly to process improvement but is not specific to testing.

GQM (Goal-Question-Metric)is a measurement approach, not a maturity model.

Evaluation of Options:

A (TMMi®)is correct as it directly incorporates a five-level maturity framework for test process improvement.

Other options are not aligned with the question context.

References and Syllabus Alignment:

TMMi is referenced in the ISTQB syllabus under "Improving the Test Process" (TM-1.5.1) as a standard for maturity models​​​.