Formula for PERT - Pessimistic time and optimistic time

Posted by karthi on Stack Overflow See other posts from Stack Overflow or by karthi
Published on 2010-05-02T07:36:12Z Indexed on 2010/05/02 7:47 UTC
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project-estimation

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I found PERT examples include a formula

(a + 4m + b)/6

where a= optimistic time , b= pessimistic time and m= actual time to complete the task

but how to calculate a and b? please help me as soon as possible

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