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# Agile estimation 2_Мел Росс

## on Oct 17, 2013

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## Agile estimation 2_Мел РоссPresentation Transcript

• Agile Estimation Part II Mel Rosso-Llopart Carnegie Mellon University Rosso-Llopart ©2013 1
• The estimation Game for Agile    Presented by Mike Cohn in the book “Agile Estimation” The process Delphi process is modified to constrain the number of choices for each estimate Instead of allowing an infinite number of choices a integer set of relative values is used to evaluate the relative size of an item Rosso-Llopart ©2013 2
• The estimation Game for Agile - 2    The sequence of choices people can use come from the Fibonacci sequence 1, 2, 3, 5, 8, 13, 21, 34, 55, 100* You select a relative value from the sequence to represent your best value for the estimate You cannot choose 2.5, or 5.3, you must choose 2 or 3 and 5 or 8 relatively Rosso-Llopart ©2013 3
• The estimation Game for Agile - 3  The values can represent size, days, or whatever you are currently estimating in. – You can multiply if you wanted Kilograms versus Grams   All that the “Game” does is it makes you say whether something is relatively greater or lesser than another item. Then when you get actual values you can give a value to your estimate. Rosso-Llopart ©2013 4
• Exercise for Agile estimation game     We will rank a number of items by relative comparisons using the sequence I will give you one actual value for the sequence We will see if you can properly sort the items based on your estimates. If you can sort them, then you can properly estimate them given some actual values. Rosso-Llopart ©2013 5
• Planning Poker Estimation technique that values the conversation that occurs during the estimation process Variant of wideband delphi Distributed team members: planningpoker.com (http://agilereckoning.com/ if poker is blocked) For Pivotal tracker: http://poker.stackbuilders.com/ There are other sites that can be used Rosso-Llopart ©2013 6