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Project Management Estimation Methods – Delphi / Wideband Delphi

Posted by mgocean on May 27, 2009 in Estimation, Project Management |

The Delphi technique is an organized way to help a group of informed experts achieves a consensus on an estimated value. It is an iterative process consisting of a series of rounds. In each round, every expert in the group anonymously and independently estimates the value of an item. No person knows the values provided […]

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Project Management Estimation Methods – PERT (Program Evaluation and Review Technique)

Posted by mgocean on May 26, 2009 in Estimation, Project Management |

PERT is probabilistic and stochastic in that variability is considered in the duration of each activity. It means PERT assumes that the duration of each activity is represented by a random variable with a known probability density function. (Lee D.E., 2005, pp: 310 – 318)   The PERT technique uses additional information from the estimator […]

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Project Management Estimation Methods – Expert Judgement

Posted by mgocean on May 25, 2009 in Estimation, Project Management |

There are at least four reasons why the algorithmic models do not perform well. First, there is the problem of software sizing. Obtaining consistent size estimates (in lines of code or Function Points) and interpreting such estimates require high skill levels and good judgment. Second, there is the issue of historical data. Most researchers have […]

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