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Expected Time given Probability Factor Formula

GoMean or Expected Time Formula

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Mean Time, also called expected time is the time needed to complete an activity. Check FAQs

t e = T s - (σ \cdot Z)

t_e - Mean Time?T_s - Scheduled Time?σ - Standard Deviation?Z - Probability Factor?

Expected Time given Probability Factor Example

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With units

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Here is how the Expected Time given Probability Factor equation looks like with Values.

Here is how the Expected Time given Probability Factor equation looks like with Units.

Here is how the Expected Time given Probability Factor equation looks like.

4.0001 = 6.7 - (1.33 \cdot 2.03)

4.0001d = 6.7d - (1.33 \cdot 2.03)

4.0001 = 6.7 - (1.33 \cdot 2.03)

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Expected Time given Probability Factor Solution

Follow our step by step solution on how to calculate Expected Time given Probability Factor?

FIRST Step Consider the formula

t e = T s - (σ \cdot Z)

Next Step Substitute values of Variables

∴

t e = 6.7d - (1.33 \cdot 2.03)

Next Step Prepare to Evaluate

∴

t e = 6.7 - (1.33 \cdot 2.03)

Next Step Evaluate

∴

t e = 345608.64s

LAST Step Convert to Output's Unit

∴

t e = 4.0001d

Expected Time given Probability Factor Formula Elements

Variables

Mean Time

Mean Time, also called expected time is the time needed to complete an activity.

Symbol: t_e

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Mean Time

Scheduled Time

Scheduled Time is the time which is made as per the experience and practice by the creator of the project.

Symbol: T_s

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Scheduled Time

Standard Deviation

The Standard Deviation is a measure of how spread out numbers are.

Symbol: σ

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Standard Deviation

Probability Factor

The probability Factor is a term used to find the probability of a project getting completed in the expected time.

Symbol: Z

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Probability Factor

Other Formulas to find Mean Time

Go Mean or Expected Time

t e = \frac{t 0 + (4 \cdot t m) + t p}{6}

Other formulas in Project Evaluation and Review Technique category

Go Optimistic Time given Expected Time

t 0 = (6 \cdot t e) - (4 \cdot t m) - t p

Go Pessimistic Time given Expected Time

t p = 6 \cdot t e - t 0 - 4 \cdot t m

Go Most Likely Time given Expected Time

t m = \frac{6 \cdot t e - t 0 - t p}{4}

Go Standard Deviation of Activity

σ = \frac{t p - t 0}{6}

How to Evaluate Expected Time given Probability Factor?

Expected Time given Probability Factor evaluator uses Mean Time = Scheduled Time-(Standard Deviation*Probability Factor) to evaluate the Mean Time, The Expected Time given Probability Factor formula is defined as the mean time for completion of the event, if a factor is 0, then scheduled time = expected time and hence probability is 50%. Mean Time is denoted by t_e symbol.

How to evaluate Expected Time given Probability Factor using this online evaluator? To use this online evaluator for Expected Time given Probability Factor, enter Scheduled Time (T_s), Standard Deviation (σ) & Probability Factor (Z) and hit the calculate button.

FAQs on Expected Time given Probability Factor

What is the formula to find Expected Time given Probability Factor?

The formula of Expected Time given Probability Factor is expressed as Mean Time = Scheduled Time-(Standard Deviation*Probability Factor). Here is an example- 4.6E-5 = 578880-(1.33*2.03).

How to calculate Expected Time given Probability Factor?

With Scheduled Time (T_s), Standard Deviation (σ) & Probability Factor (Z) we can find Expected Time given Probability Factor using the formula - Mean Time = Scheduled Time-(Standard Deviation*Probability Factor).

What are the other ways to Calculate Mean Time?

Here are the different ways to Calculate Mean Time-

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

Can the Expected Time given Probability Factor be negative?

No, the Expected Time given Probability Factor, measured in Time cannot be negative.

Which unit is used to measure Expected Time given Probability Factor?

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

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Expected Time given Probability Factor Formula

​GoMean or Expected Time Formula

Expected Time given Probability Factor Example

Expected Time given Probability Factor Solution

Expected Time given Probability Factor Formula Elements

Other Formulas to find Mean Time

Other formulas in Project Evaluation and Review Technique category

How to Evaluate Expected Time given Probability Factor?

FAQs on Expected Time given Probability Factor

Variable Name

GoMean or Expected Time Formula