We don’t have any process defined for DAR. We want our firm to achieve Level 3 maturity but we have to start from scratch. How to go about it? Can we have a policy and a guideline for DAR process and integrate in our product creation process? What tools can we use to facilitate DAR?
DAR, or Decision Analysis and Resolution, is a ML3 Process Area that is used to help us make complex decisions in during times of stress and chaos. It is a structured process that uses guidelines and criteria to drive decisions that might otherwise be driven by emotion, money, or vendor favors (like golf, tickets, or cash).
DAR starts with guidelines that determine WHEN it should be used (such as "DAR is always used for product selection"). Then there are criteria and methods defined to help you make the decision.
Like of CMMI PA's, it's perfectly fine to integrate it into your "product creation" processes. In fact, the PA Technical Solution, or TS, takes advantage of DAR in the very first practice.
You can start with some simple guidelines and some spreadsheets that help you manage scoring or setting of criteria. From there you can grow a "DAR Library" that can be reusable from project to project.