Estimating Time

Hassan Ali Hassan Ali

Hassan Ali

Certified International Supply Chain Consultant (CISCC, Level 3) Certified International Supply Chain Manager (CISCM, Level 2)

发布日期: 2023年10月31日
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When building your schedule, never guess times. Gather the most reliable information possible and use a scientific formula to get the best estimate. The better your estimates, the more reliable your plan will be.

This formula is considered the standard for estimating time (Te):

To+4Tm+Tp?/ 6??????????????

????? Tm= Probable Time

????? To= Optimistic Time

????? Tp=Pessimistic Time

????? Te=Calculated Time (Best Estimate)

First, make a table, list your tasks, and fill in the estimated time for each. (We have numbered our tasks in the example on the next page for easy identification.) Time can be listed in minutes, hours, days, weeks, months, or years. You should keep the same time scale for each task.

?Next, identify what the best and worst case estimates would be. Now, for each task, plug the numbers into the formula given above. The result is the estimated time.


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