In different phases of product development cycle, there are fairly routine processes which are repeated in different workflows. For example, review as a sub-process is executed for different types of work product like a project plan, system design architecture, etc. Though the processes can differ, some of the sub-processes like review go through same steps to achieve the end result.

In Stages, such routine processes can be modeled once and reused in workflows which consume the process.

Model the routine process process in a workflow. The details of this routine process should be generic enough for it to be consumed in other workflows.

Joint Review Process is a typical peer review that happens at differents areas of product development lifecycle. It is held within development phases, between milestone reviews, on completion of work products. Defining it as a routine process allows to keep the details of the process consistent and standard across any form of review.