Experimental study of individual subjective effort estimations and combinations of the estimates

  • Host M
  • Wohlin C
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The required effort of a task can be estimated subjectively in
interviews with experts in an organization in different ways. Interview
techniques dealing with which type of questions to ask are evaluated and
techniques for combining estimates from individuals into one estimate
are compared in an experiment. The result shows that the interview
technique is not as important as the combination technique. The estimate
which is best with respect to mean value and standard deviation of the
effort is based on an equal weighting of all individual estimates. The
experiment is performed within the Personal Software Process (PSP)

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