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Title:
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TIME ESTIMATION IMPROVEMENT IN AGILE
DEVELOPMENT |
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Author(s):
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Willem van der Feltz, Niels van der Pas and Mark van der Pas |
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ISBN:
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978-989-8704-19-1 |
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Editors:
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Piet Kommers and Guo Chao Peng |
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Year:
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2020 |
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Edition:
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Single |
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Keywords:
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IT Projects, IT Portfolio Management, Plan Accuracy, Deadlines, Decision Support |
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Type:
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Full |
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First Page:
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49 |
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Last Page:
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56 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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Estimating the time needed to execute an IT project has turned out to be a major challenge in daily praxis. Despite high
inaccuracies, these estimations are important as they can be used to determine the cost for offering an IT project and in
deciding whether to execute it at all. In this study we focused on the estimations for user stories created by a European
Software company delivering 100% of their software in an agile way of working. Over a time-span of 10 months, 1738
estimations were created on small user stories (around 5 hours of work on average). Three main conclusions could be
drawn from the data. Firstly, it was found that smaller-than-two-hour user stories were over-estimated roughly as
frequently as under-estimated. In contrast, estimations for larger-than-two-hour user stories were less balanced and on
average too low (under-estimated). Secondly, and surprisingly, we did not see that estimations were better when the
estimator was able to execute the task himself versus when he was not. The statistics suggest that estimators who are able
to do the task themselves tend to underestimate the time needed to deliver the user story. Finally, we found that the
accuracy of estimations does not improve over time. |
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