Once you’ve built your model, you may discover there are simply too many tasks for a reasonable assessment.  E.g. if you’ve identified more than 40 tasks, the assessment will simply take too long, and you’ll lose the intrinsic motivation you’re trying to create.  There is no hard or fast rule, 20 – 25 tasks is the max.

Think about it logically.  If it takes about 1 - 1.5 minutes to review behavioral examples and select a value (in a meaningful and thoughtful way), and you have 50 competencies, that’s 50-75 minutes.  Can you say “survey fatigue”?  On the other hand, if you select the 20-25 most critical, it should take ~30 minutes… a much more realistic request.  Plus, who can focus on that many skills and potential gaps?! 

During the model development process, we recommend the high performers identify which tasks are most critical to success to narrow the list.  But there’s also the aspect of strategic workforce planning – identifying skills the organization believes will differentiate it in the future… for example, some technology that will drive competitive advantage.  You want to be sure to call out that technology separately, so you can easily identify organizational experts.  Or you know that many people with a particular expertise are retiring, and you need to know which experts remain, so you can leverage them to create new experts (“nexperts”).  So a hybrid approach is best.

Then you iterate.  Launch the competency assessment, but remember, it’s always in beta.  Your competency models are not fixed in stone.  You put it out there, you get feedback, you get data, and you continue to iterate it to capture changes in strategy, in tools, in technology, and in the environment in which you operate, so you can always focus on the critical tasks and skills for that point in time.  It may be that your assessment includes 20 now, and next year, you remove 8 and add 10 new ones.

For more on creating a competency model quickly, see the free ATD webinar.