Which of the following is NOT used to evaluate process performance?

To understand why the answer is B, it's important to look closely at what evaluating process performance means in the context of CMMI. Evaluating process performance typically involves assessing how well a process meets its intended goals and objectives, which often includes metrics related to efficiency, effectiveness, and predictability.

Schedule predictability refers to how closely actual project timelines align with planned schedules. This metric is crucial for understanding if processes are being carried out in a timely manner.

Delivered functionality refers to the actual output of a process in terms of the features or functions completed. This metric helps organizations verify that they provide value to their customers and meet requirements effectively.

Resource cost involves measuring the expenses incurred during a project, which can highlight inefficiencies in resource use and allow organizations to evaluate the economic aspect of their processes.

Process compliance, on the other hand, refers to adherence to defined processes or standards without directly measuring the performance of those processes in a way that contributes to understanding their effectiveness or efficiency. While compliance is important for ensuring that processes are followed, it does not directly provide insights into how well those processes perform in achieving desirable outcomes or objectives, which is why it is not typically used to evaluate process performance directly.