Pessimistic Time when Expected Time is Known Calculator

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Engineering	Civil ↺
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Construction Practice, Planning and Management	Project Evaluation and Review Technique ↺

✖Mean time, also called as expected time is the time needed to complete an activity.ⓘ Mean time [t_e]			+10% -10%
✖Optimistic time is the shortest possible time to complete the activity if all goes well.ⓘ Optimistic time [t₀]			+10% -10%
✖Most likely time is the normal time activity would take.ⓘ Most likely time [t_m]			+10% -10%

✖Pessimistic time is the longest time that activity could take if everything is wrong.ⓘ Pessimistic Time when Expected Time is Known [t_p]

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Credits

Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has created this Calculator and 400+ more calculators!

Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has verified this Calculator and 300+ more calculators!

Pessimistic Time when Expected Time is Known Solution

STEP 0: Pre-Calculation Summary

Formula Used

pessimistic_time = 6*Mean time-Optimistic time-4*Most likely time
t_p = 6*t_e-t₀-4*t_m
This formula uses 3 Variables

Variables Used

Mean time - Mean time, also called as expected time is the time needed to complete an activity. (Measured in Day)
Optimistic time - Optimistic time is the shortest possible time to complete the activity if all goes well. (Measured in Day)
Most likely time - Most likely time is the normal time activity would take. (Measured in Day)

STEP 1: Convert Input(s) to Base Unit

Mean time: 20 Day --> 1728000 Second (Check conversion here)
Optimistic time: 120 Day --> 10368000 Second (Check conversion here)
Most likely time: 180 Day --> 15552000 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_p = 6*t_e-t₀-4*t_m --> 6*1728000-10368000-4*15552000

Evaluating ... ...

t_p = -62208000

STEP 3: Convert Result to Output's Unit

-62208000 Second -->-720 Day (Check conversion here)

FINAL ANSWER

-720 Day <-- Pessimistic time

(Calculation completed in 00.032 seconds)

You are here

< 11 Other formulas that you can solve using the same Inputs

PERT expected time

pert_expected_time = (Optimistic time+(4*Most likely time)+Pessimistic time)/6 Go

Optimistic Time when Expected Time is Known

optimistic_time = (6*Mean time)-(4*Most likely time)-Pessimistic time Go

Mean or Expected Time

mean_time = (Optimistic time+(4*Most likely time)+Pessimistic time)/6 Go

Most Likely Time when Expected Time is Known

most_likely_time = (6*Mean time-Optimistic time-Pessimistic time)/4 Go

Standard Deviation when Probability Factor is Given

standard_deviation = (Scheduled time-Mean time)/Probability factor Go

Scheduled Time when Probability Factor is Known

scheduled_time = (Standard Deviation*Probability factor)+Mean time Go

Probability Factor

probability_factor = (Scheduled time-Mean time)/Standard Deviation Go

Standard Deviation of an Activity

standard_deviation = (Pessimistic time-Optimistic time)/6 Go

Standard Deviation

standard_deviation = (Pessimistic time-Optimistic time)/6 Go

Pessimistic Time when Standard Deviation is Known

pessimistic_time = 6*Standard Deviation+Optimistic time Go

Variance

variance = ((Pessimistic time-Optimistic time)/6)^2 Go

< 1 Other formulas that calculate the same Output

Pessimistic Time when Standard Deviation is Known

pessimistic_time = 6*Standard Deviation+Optimistic time Go

Pessimistic Time when Expected Time is Known Formula

pessimistic_time = 6*Mean time-Optimistic time-4*Most likely time
t_p = 6*t_e-t₀-4*t_m

What is PERT ?

PERT stands for project evaluation review technique. It involves uncertainty in the project completion. It is a numerical technique used in projects where the time cannot be accurately estimated.

How to Calculate Pessimistic Time when Expected Time is Known?

Pessimistic Time when Expected Time is Known calculator uses pessimistic_time = 6*Mean time-Optimistic time-4*Most likely time to calculate the Pessimistic time, The Pessimistic Time when Expected Time is Known is the maximum time required to complete an activity under worst conditions. Pessimistic time and is denoted by t_p symbol.

How to calculate Pessimistic Time when Expected Time is Known using this online calculator? To use this online calculator for Pessimistic Time when Expected Time is Known, enter Mean time (t_e), Optimistic time (t₀) and Most likely time (t_m) and hit the calculate button. Here is how the Pessimistic Time when Expected Time is Known calculation can be explained with given input values -> -720 = 6*1728000-10368000-4*15552000.

FAQ

What is Pessimistic Time when Expected Time is Known?

The Pessimistic Time when Expected Time is Known is the maximum time required to complete an activity under worst conditions and is represented as t_p = 6*t_e-t₀-4*t_m or pessimistic_time = 6*Mean time-Optimistic time-4*Most likely time. Mean time, also called as expected time is the time needed to complete an activity, Optimistic time is the shortest possible time to complete the activity if all goes well and Most likely time is the normal time activity would take.

How to calculate Pessimistic Time when Expected Time is Known?

The Pessimistic Time when Expected Time is Known is the maximum time required to complete an activity under worst conditions is calculated using pessimistic_time = 6*Mean time-Optimistic time-4*Most likely time. To calculate Pessimistic Time when Expected Time is Known, you need Mean time (t_e), Optimistic time (t₀) and Most likely time (t_m). With our tool, you need to enter the respective value for Mean time, Optimistic time and Most likely time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Pessimistic time?

In this formula, Pessimistic time uses Mean time, Optimistic time and Most likely time. We can use 1 other way(s) to calculate the same, which is/are as follows -

pessimistic_time = 6*Standard Deviation+Optimistic time

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