An IT governance body wants to determine whether IT service delivery is based on consistently effective processes. Which of the following is the BEST approach?

A maturity model provides a structured framework to evaluate the current state of processes, identify strengths and weaknesses, and define steps to achieve higher levels of process sophistication and consistency. By applying a maturity model, an IT governance body can systematically determine if IT service delivery processes are consistently effective and identify pathways for improvement towards a desired mature state.

Evaluating KPIs measures process outcomes and performance, but does not provide a holistic assessment of the underlying process consistency and effectiveness as comprehensively as a maturity model.

A gap analysis identifies differences between a current and desired state but lacks the structured, staged approach of a maturity model for assessing overall process effectiveness and consistency.

Control self-assessment (CSA) focuses on the effectiveness of specific controls within processes, not the overall maturity or consistent effectiveness of the IT service delivery processes themselves.