## Variance And Standard Deviation In PERT Formula [PMP]

You might be looking to understand the usage of variance and standard deviation in PERT formula. PERT is an acronym for Program Evaluation and Review technique. This technique is used to determine duration and cost estimates of a task. In this technique, a weighted average (mean) of three different estimates is used to determine the…

## How To Use PERT Formula For Three Point Estimating?

PERT Formula is one on the ways for doing three point estimation. It calculates expected duration by finding the weighted average of three different estimates viz. Optimistic (O), Pessimistic (P), and Most Likely (M). E_PERT=(O+P+4×M)/6 The three point estimation can also be done by using simple average formula. E_SA=(O+P+M)/3 PERT (Program Evaluation and Review Technique)…

## Total Float vs Free Float: Formulas & Differences

Total Float is the maximum amount of time an activity can be delayed without delaying the project whereas Free Float is the amount of time an activity can be delayed without impacting the Early Start date of any of its immediate successors. Total Float and Free Float are used in Critical Path Method (CPM) to…

## Scientific Estimation

This is a follow-up post of my previous post 8 ways to meet budget in Fixed Price Projects. We can successfully execute and deliver the project within specified time and budget by estimating the size of the project scientifically. There are upteen estimation techniques and they are different for different industries. And within a industry they…