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The type of forecast to be applied is entirely dependent on what needs to be communicated from the data. For example, comparing a Baseline with Best Possible can highlight where a job is not meeting expectations, whereas viewing the Best Possible alone shows the current expected completion date.
% Complete
The percentage complete on a job is a measure of how much of its programme is completed. It is a calculation of the number of days completed, and the total length of the programme. eg. Consider a programme is 200 days long (ie. 40 weeks)
If 50 days of the programme are marked as completed, the % Complete is: 50/200 = 25% complete
Note that this calculation has nothing to do with Possible days and how long it took to get the 50 days work completed. It doesn't matter if it took 40, 50, or 100 days of actual time to complete the 50 days work in the above example. The percentage complete is still 25%.
What To Do
To ensure forecasting is effective, it is essential to have accurate dates calculating against realistic allowances. This means that the logistic programmes have to be set up with allowances that reflect a balance between what is required, expected and desired.
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