Establish Process Performance Models
Process performance models are used to estimate or predict the value of a process performance measure from the values of other process and product measurements. These process performance models typically use process and product measurements collected throughout the life of the project to estimate progress toward achieving objectives that cannot be measured until later in the project’s life.

The process performance models are used as:

These measures and models are defined to provide insight into and to provide the ability to predict critical process and product characteristics that are relevant to business value.