Pessimistic Time given Expected Time Calculator

✖Mean Time, also called 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%

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

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Pessimistic Time given Expected Time 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 4 Variables

Variables Used

Pessimistic Time - (Measured in Day) - A Pessimistic Time is the longest time that an activity could take if everything is wrong.
Mean Time - (Measured in Day) - Mean Time, also called expected time is the time needed to complete an activity.
Optimistic Time - (Measured in Day) - Optimistic Time is the shortest possible time to complete the activity if all goes well.
Most Likely Time - (Measured in Day) - Most Likely Time is the normal time activity would take.

STEP 1: Convert Input(s) to Base Unit

Mean Time: 4 Day --> 4 Day No Conversion Required
Optimistic Time: 2 Day --> 2 Day No Conversion Required
Most Likely Time: 3 Day --> 3 Day No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_p = 6*t_e-t₀-4*t_m --> 6*4-2-4*3

Evaluating ... ...

t_p = 10

STEP 3: Convert Result to Output's Unit

864000 Second -->10 Day (Check conversion here)

FINAL ANSWER

10 Day <-- Pessimistic Time

(Calculation completed in 00.020 seconds)

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Credits

Created by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has created this Calculator and 500+ more calculators!

Verified by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has verified this Calculator and 700+ more calculators!

< Project Evaluation and Review Technique Calculators

Optimistic Time given Expected Time

LaTeX Go Optimistic Time = (6*Mean Time)-(4*Most Likely Time)-Pessimistic Time

Mean or Expected Time

LaTeX Go Mean Time = (Optimistic Time+(4*Most Likely Time)+Pessimistic Time)/6

Most Likely Time given Expected Time

LaTeX Go Most Likely Time = (6*Mean Time-Optimistic Time-Pessimistic Time)/4

Pessimistic Time given Expected Time

LaTeX Go Pessimistic Time = 6*Mean Time-Optimistic Time-4*Most Likely Time

Pessimistic Time given Expected Time Formula

LaTeX Go

Pessimistic Time = 6*Mean Time-Optimistic Time-4*Most Likely Time
t_p = 6*t_e-t₀-4*t_m

What is Programme Evaluation and Review Technique (PERT)?

It is a numerical technique used in projects in which time cannot be estimated accurately such as research and development projects. It is an event-oriented network. Cost is assumed to be directly proportional to time.
Three time estimates are made in PERT.
1. Optimistic time (to): This is the minimum possible time in which an activity can be completed under the most ideal conditions.
2. Pessimistic time (tp): This is the maximum time required to complete an activity under the worst possible conditions.
3. Most likely time (tm): This is the time required to complete an activity under normal working conditions. It's value lies between to and tp It is near to the expected time.

What is Central Limit Theorem and Critical Path?

Central Limit Theorem: The theorem states that a project consists of a large number of activities, where each activity has its own mean time (te), standard deviation (σ), variance (σ2) and also its own ß-distribution curve.
Critical Path: The time-wise longest path is the critical path. In this path, any type of delay in any event will cause a delay in the project. These are shown by double lines or dark lines in a network.

How to Calculate Pessimistic Time given Expected Time?

Pessimistic Time given Expected Time calculator uses Pessimistic Time = 6*Mean Time-Optimistic Time-4*Most Likely Time to calculate the Pessimistic Time, The Pessimistic Time given Expected Time formula is defined as the maximum time required to complete the activity under the worst conditions. Pessimistic Time is denoted by t_p symbol.

How to calculate Pessimistic Time given Expected Time using this online calculator? To use this online calculator for Pessimistic Time given Expected Time, enter Mean Time (t_e), Optimistic Time (t₀) & Most Likely Time (t_m) and hit the calculate button. Here is how the Pessimistic Time given Expected Time calculation can be explained with given input values -> 0.000116 = 6*345600-172800-4*259200.

FAQ

What is Pessimistic Time given Expected Time?

The Pessimistic Time given Expected Time formula is defined as the maximum time required to complete the activity under the 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 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 & Most Likely Time is the normal time activity would take.

How to calculate Pessimistic Time given Expected Time?

The Pessimistic Time given Expected Time formula is defined as the maximum time required to complete the activity under the worst conditions is calculated using Pessimistic Time = 6*Mean Time-Optimistic Time-4*Most Likely Time. To calculate Pessimistic Time given Expected Time, you need Mean Time (t_e), Optimistic Time (t₀) & Most Likely Time (t_m). With our tool, you need to enter the respective value for Mean Time, Optimistic Time & 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 & 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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