Capacity Planning: Respecting the Buffer

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Capacity Planning: Respecting the Buffer

Tamara Sulaiman, PMP, CST

March 9, 2009






When I go in to help teams suffering from incomplete or missed iteration goals, one area that I naturally look at is the iteration planning. How is the iteration planned? Does the team use velocity as a measure of “yesterday’s weather” with capacity as a double-check? Is the team empowered to say no to more work? Are they using a buffer in their capacity planning? If so, what is it? Has it been adjusted lately? How?
 
I also look at what happens during the iteration. Are the team and management respecting the buffer? How are critical fixes and production support being handled during the iteration? While there can be many root causes for a team consistently not meeting iteration goals, I do find that a misunderstanding of what the buffer is for--or simply not respecting that buffer--is a leading cause of missed iteration goals.
 
What is the buffer?
The buffer is calculated as part of capacity planning for iterations.



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