PERT Expected Time Calculator

✖Optimistic Time is the shortest possible time to complete the activity if all goes well.ⓘ Optimistic Time [T_optimistic]			+10% -10%
✖Most Likely Time is the normal time activity would take.ⓘ Most Likely Time [t_m]			+10% -10%
✖A pessimistic Time is the longest time that an activity could take if everything is wrong.ⓘ Pessimistic Time [T_Pessimistic]			+10% -10%

✖PERT Expected Time is a method of calculating project completion times both for your own scheduling and for your customers' needs.ⓘ PERT Expected Time [t_e]

⎘ Copy

👎

Formula

✖

PERT Expected Time

Formula

`"t"_{"e"} = ("T"_{"optimistic"}+4*"t"_{"m"}+"T"_{"Pessimistic"})/6`

Example

`"5.166667d"=("9d"+4*"3d"+"10d")/6`

Calculator

LaTeX

Reset

👍

Download Time Estimation Formulas PDF

PERT Expected Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6
t_e = (T_optimistic+4*t_m+T_Pessimistic)/6
This formula uses 4 Variables

Variables Used

PERT Expected Time - (Measured in Second) - PERT Expected Time is a method of calculating project completion times both for your own scheduling and for your customers' needs.
Optimistic Time - (Measured in Second) - Optimistic Time is the shortest possible time to complete the activity if all goes well.
Most Likely Time - (Measured in Second) - Most Likely Time is the normal time activity would take.
Pessimistic Time - (Measured in Second) - A pessimistic Time is the longest time that an activity could take if everything is wrong.

STEP 1: Convert Input(s) to Base Unit

Optimistic Time: 9 Day --> 777600 Second (Check conversion here)
Most Likely Time: 3 Day --> 259200 Second (Check conversion here)
Pessimistic Time: 10 Day --> 864000 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_e = (T_optimistic+4*t_m+T_Pessimistic)/6 --> (777600+4*259200+864000)/6

Evaluating ... ...

t_e = 446400

STEP 3: Convert Result to Output's Unit

446400 Second -->5.16666666666667 Day (Check conversion here)

FINAL ANSWER

5.16666666666667 ≈ 5.166667 Day <-- PERT Expected Time

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Mechanical » Industrial Engineering » Time Estimation » PERT Expected Time

Credits

Created by Suman Ray Pramanik

Indian Institute of Technology (IIT), Kanpur

Suman Ray Pramanik has created this Calculator and 50+ more calculators!

Verified by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

Akshada Kulkarni has verified this Calculator and 900+ more calculators!

< 16 Time Estimation Calculators

Expected Waiting Time for Customers in Queue

Go Expected Waiting Time for Customers in Queue = Mean Arrival Rate/(Mean Service Rate*(Mean Service Rate-Mean Arrival Rate))

Standard Normal Variation

Go Standard Normal Variation = (Normal Variate-Expected Value)/Standard Deviation

PERT Expected Time

Go PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6

Time Taken for Manufacturing Model with Shortage

Go Time taken for Manufacturing Model with Shortage = EOQ Manufacturing Model with Shortage/Demand per Year

Independent Float

Go Independent Float = Early Finish Time-Late Start Time-Activity Time

Total Float

Go Total Float = Late Finish Time-(Early Start Time+Activity Time)

Free Float

Go Free Float = Early Finish Time-Early Start Time-Activity Time

Expected Waiting Time for Customers in System

Go Expected Waiting Time for Customers in System = 1/(Mean Service Rate-Mean Arrival Rate)

Time Taken for Purchase Model with No Shortage

Go Time taken for Purchase Model no Shortage = Economic Order Quantity/Demand per Year

Time Taken for Purchase Model with Shortage

Go Time taken for Purchase Model with Shortage = EOQ Purchase Model/Demand per Year

Total Float given Finish Time

Go Total Float given Finish Times = Late Finish Time-Early Finish Time

Standard Deviation given Optimistic and Pessimistic Time

Go Standard Deviation = (Pessimistic Time-Optimistic Time)/6

Independent Float given Slack

Go Independent Float given Slack = Free Float-Slack of Event

Late Finish Time

Go Late Finish Time = Late Start Time+Duration of Activity

Early Finish Time

Go Early Finish Time = Early Start Time+Safety Stock

Total Float given Start Time

Go Total Float = Late Start Time-Early Start Time

PERT Expected Time Formula

PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6
t_e = (T_optimistic+4*t_m+T_Pessimistic)/6

What is PERT?

PERT stands for the program evaluation and review technique, which is a method of calculating project completion times both for your own scheduling and for your customers' needs. The PERT calculation takes into consideration the shortest, longest, and most likely amount of time you think it will take to complete a project in order to help you plan your time in the most accurate way possible.

How to Calculate PERT Expected Time?

PERT Expected Time calculator uses PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6 to calculate the PERT Expected Time, PERT expected time is a method of calculating project completion times both for your own scheduling and for your customers' needs. PERT Expected Time is denoted by t_e symbol.

How to calculate PERT Expected Time using this online calculator? To use this online calculator for PERT Expected Time, enter Optimistic Time (T_optimistic), Most Likely Time (t_m) & Pessimistic Time (T_Pessimistic) and hit the calculate button. Here is how the PERT Expected Time calculation can be explained with given input values -> 6E-5 = (777600+4*259200+864000)/6.

FAQ

What is PERT Expected Time?

PERT expected time is a method of calculating project completion times both for your own scheduling and for your customers' needs and is represented as t_e = (T_optimistic+4*t_m+T_Pessimistic)/6 or PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6. Optimistic Time is the shortest possible time to complete the activity if all goes well, Most Likely Time is the normal time activity would take & A pessimistic Time is the longest time that an activity could take if everything is wrong.

How to calculate PERT Expected Time?

PERT expected time is a method of calculating project completion times both for your own scheduling and for your customers' needs is calculated using PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6. To calculate PERT Expected Time, you need Optimistic Time (T_optimistic), Most Likely Time (t_m) & Pessimistic Time (T_Pessimistic). With our tool, you need to enter the respective value for Optimistic Time, Most Likely Time & Pessimistic Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search