Portfolio Management Step 2-Identify Selection Criteria
The second step of portfolio management is to identify selection criteria. This step is one of the most critical steps to the process of selecting what you should do out of everything you could do. When presented with any choice we immediately begin to take into consideration our selection criteria. Even with a simple decision such as which movie I want to watch tonight. I go through a series of selection criteria, what genre do I want? Comedy, Action, Drama? What’s the rating? Can the kids watch it with me? How long is the movie? What actors are in it? Depending on my situational constraints I will use criteria to help me get my desired result. I want a funny movie I can watch with the entire family, with Steve Martin, that’s not a new release, that’s less than 2hrs long because we have to get the kids to bed by 7:30pm, and that I don’t have to return for at least 3 days because I’m leaving early in the morning for a 2 day business trip. 
When deciding on selection criteria we have to look at our current situation or constraints and identify criteria that will make our decision fit within those constraints. One key about selection criteria is that they must be orthogonal, meaning independent, non-redundant, and non-overlapping. If they are not orthogonal you are inadvertently giving a criterion extra weighting. For instance, CPU clock rate and Whetstone performance are closely coupled computer parameters–do not use both. Things like, cost, effort, or complexity are typically used as criteria. Any one of these is fine, but if you use two or more you will probably have skewed results. When people do not have a hard cost number they usually estimate cost based on complexity or effort. When they try to estimate effort they typically look at how complex a project/feature/requirement is and then estimate effort. Sometimes the best way to ensure that this isn’t happening is take a set of stakeholders that are making the decisions and ask what they believe each criteria is measured, or how they will base their rankings. Unless clearly defined and given unique metrics that do not overlap these criteria will lead to over weighted selection criteria, that will deliver results not in line with your strategy or business objectives. In the next step of portfolio management we will address Identifying Ranking Metrics for each selection criteria.



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