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Decision Analysis and Resolution (DAR) Process explained

Posted on 12/27/2009 05:03:00 PM by Abhijeet Bhagat




Decision Analysis and Resolution (DAR) Process

Introduction : DAR is a Process area in CMMI to aid systematic decision process.

Purpose : DAR is a Formal method of evaluation of key decisions for proposed solutions. Avoids reactionary decisions.DAR can be applied to any / all levels of decisions made within a project. Although its true that we can apply DAR to any decision making process still  in practice it is limited to key decisions  identified by the event triggers. Applying DAR to each and every decision may  impede the
program's progress. Completed DAR worksheets will be stored in the approved program document repository according to the Configuration Management Plan.
What are these 

What are Event Triggers : Event triggers are typically the criterion which call for formal evaluation process.
examples,
  • This Tool Versus That Tool for Automation.
  • Function Library versus Dll Approach.
  • Make/buy/reuse decisions
  • Significant architectural changes
  • Selection of third party solution providers
  • Selection of organizational tools
  • Modification of organizational processes

Roles: There are three roles involved in DAR
  • Decision Owner : One who is to ensure that the final decision is reached.
  • Decision Participant : One Who is involved in the DAR Process having necessary background and education on how DAR is conducted.
  • Decision Stakeholders : One who is likely to be affected by the decision.
The Process  - Step 1
Solution Identification : One needs to identify a minimal set of solutions for a given problem. If the number of solutions is typically more that 4-5 then we need to apply appropriate elimination techniques and identify the best 4-5 solution.
The Solutions can be identified by various methods :
    • Brainstorming..
    • Quizzes.
    • Market Research.
    • Customer Feedback reports.
    • Expertise analysis and white papers.
    • Historical data if any. 
example lets say we have identified  Solutions A,B,C for this study.
     The Process  - Step 2
    Evaluation Criteria : The Specific points against which the solutions will be weighed.For each criteria we shall assign a weight also called as coefficient. Coefficient will help us decide the importance of this criteria. Larger the coefficient more the criteria is important.

    example


    Evaluation
    Criteria


    Coefficient

    X

    5

    Y

    3

    Z

    1

     The Process  - Step 3
    Solution Evaluation :Evaluate each of the solutions for the established criterion and assign individual rank to the solutions. example
    Solution A  --> Criteria X --> rank 4
    Solution A --> Criteria Y -->rank 3 and so on...
    Note :- Higher the score the better is the solution for this specific criteria.

      The Process  - Step 4
    Computation :
    Once the solutions are ranked for each evaluation criteria, the total score for each solution is computed. The total score shall be the weighted summation of the evaluation criteria. A higher
    score represents a better solution choice.The method used to compute the total score shall be:
    Total Score = sum (rank x coefficient) for each evaluation criteria.
    The following Table  provides an example of evaluating  3 potential solutions A,B,C
    suppliers using the coefficients from Table above



    Evaluation Criteria

    Coefficient

    Solution
    A


    Solution
    B


    Solution
    C


    X

    5

    4

    3

    2

    Y

    3

    3

    2

    3

    Z

    1

    2

    2

    1

    Total

    31

    23

    20

      The Process  - Step 5
    Solution Selection :The solution with the highest total score shall be selected. In the
    event of a tie between multiple solutions, the solution with thebest (highest) ranking for the most important evaluation criteria shall be selected.
    In the example shown in table above, Solution A would be selected since it has the best (highest) Total Score.


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