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(Almost) everything you need to know to begin doing Agile Estimation - TechEd Middle East 2011 IAT205
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(Almost) everything you need to know to begin doing Agile Estimation - TechEd Middle East 2011 IAT205

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"Prediction is very difficult, especially about the future” – Niels Bohr, Danish physicist. For better or for worse, most times estimation is not optional during software development projects. And …

"Prediction is very difficult, especially about the future” – Niels Bohr, Danish physicist. For better or for worse, most times estimation is not optional during software development projects. And there are some key questions about it, which sooner or later, anyone involved in such activities does wonder about. Why do we even care about estimations? What are the outcomes that we obtain from estimating – if any? When should I provide estimations? What am I supposed to measure when estimating? Which artifacts are subjected to receive estimations? Are there any helpful tools or techniques? When are we going to deliver? … You’re invited to join us in this interactive discussion about Agile Estimation, where you’ll be challenged to expand the former list and receive some useful answers!

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  • Examples of estimations:Number of people living in a country in a givenmomentNumber of grains of sand in thedesertNumber of stars in ourgalaxy
  • Estimation always implies uncertainty Most times, uncertainty is higher when estimations are more used, needed or demandedA Goal is a statement of a business objectiveBut desirable or mandatory doesn’t neccesarily mean achievableCommitments are made to datesAny estimation implies a probability – you shouldn’t commit to a probabilityNevertheless, you can commit to a date while having in mind the uncertaintyAn estimation should be unbiased and aimed at accuracyA plan is biased and usually needs to accomodate some goalsEstimation is a part of planning. Plans depend on estimationsAn user can’t run or use an estimate. An estimate is not a piece of working softwareOnce the project is over, most times estimates are not valuable for the customerBecause of this, we should do estimations only when it’s really needed or valuable (more on this later…)
  • Anestimateisonly a number… It’swronganyway