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PERT Expected Time Formula

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PERT Expected Time is a method of calculating project completion times both for your own scheduling and for your customers' needs. Check FAQs

t e = \frac{T optimistic + 4 \cdot t m + T Pessimistic}{6}

t_e - PERT Expected Time?T_optimistic - Optimistic Time?t_m - Most Likely Time?T_Pessimistic - Pessimistic Time?

PERT Expected Time Example

With values

With units

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Here is how the PERT Expected Time equation looks like with Values.

Here is how the PERT Expected Time equation looks like with Units.

Here is how the PERT Expected Time equation looks like.

11.8333 = \frac{9 + 4 \cdot 13 + 10}{6}

11.8333d = \frac{9d + 4 \cdot 13d + 10d}{6}

11.8333 = \frac{9 + 4 \cdot 13 + 10}{6}

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PERT Expected Time Solution

Follow our step by step solution on how to calculate PERT Expected Time?

FIRST Step Consider the formula

t e = \frac{T optimistic + 4 \cdot t m + T Pessimistic}{6}

Next Step Substitute values of Variables

∴

t e = \frac{9d + 4 \cdot 13d + 10d}{6}

Next Step Convert Units

∴

t e = \frac{777600s + 4 \cdot 1.1E+6s + 864000s}{6}

Next Step Prepare to Evaluate

∴

t e = \frac{777600 + 4 \cdot 1.1E+6 + 864000}{6}

Next Step Evaluate

∴

t e = 1022400s

Next Step Convert to Output's Unit

∴

t e = 11.8333333333333d

LAST Step Rounding Answer

∴

t e = 11.8333d

PERT Expected Time Formula Elements

Variables

PERT Expected Time

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

Symbol: t_e

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find PERT Expected Time

Optimistic Time

Optimistic Time is the shortest possible time to complete the activity if all goes well.

Symbol: T_optimistic

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Optimistic Time

Most Likely Time

Most Likely Time is the normal time activity would take.

Symbol: t_m

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Most Likely Time

Pessimistic Time

A pessimistic Time is the longest time that an activity could take if everything is wrong.

Symbol: T_Pessimistic

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Pessimistic Time

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How to Evaluate PERT Expected Time?

PERT Expected Time evaluator uses PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6 to evaluate 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 evaluate PERT Expected Time using this online evaluator? To use this online evaluator for PERT Expected Time, enter Optimistic Time (T_optimistic), Most Likely Time (t_m) & Pessimistic Time (T_Pessimistic) and hit the calculate button.

FAQs on PERT Expected Time

What is the formula to find PERT Expected Time?

The formula of PERT Expected Time is expressed as PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6. Here is an example- 0.000137 = (777600+4*1123200+864000)/6.

How to calculate PERT Expected Time?

With Optimistic Time (T_optimistic), Most Likely Time (t_m) & Pessimistic Time (T_Pessimistic) we can find PERT Expected Time using the formula - PERT Expected Time = (Optimistic Time+4*Most Likely Time+Pessimistic Time)/6.

Can the PERT Expected Time be negative?

No, the PERT Expected Time, measured in Time cannot be negative.

Which unit is used to measure PERT Expected Time?

PERT Expected Time is usually measured using the Day[d] for Time. Second[d], Millisecond[d], Microsecond[d] are the few other units in which PERT Expected Time can be measured.

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PERT Expected Time Formula

PERT Expected Time Example

PERT Expected Time Solution

PERT Expected Time Formula Elements

Other formulas in Time Estimation category

How to Evaluate PERT Expected Time?

FAQs on PERT Expected Time

Variable Name