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Standard Deviation of Activity Formula

GoStandard Deviation given Probability Factor Formula

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

σ = \frac{t p - t 0}{6}

σ - Standard Deviation?t_p - Pessimistic Time?t₀ - Optimistic Time?

Standard Deviation of Activity Example

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Here is how the Standard Deviation of Activity equation looks like with Values.

Here is how the Standard Deviation of Activity equation looks like with Units.

Here is how the Standard Deviation of Activity equation looks like.

1.3333 = \frac{10 - 2}{6}

1.3333 = \frac{10d - 2d}{6}

1.3333 = \frac{10 - 2}{6}

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Standard Deviation of Activity Solution

Follow our step by step solution on how to calculate Standard Deviation of Activity?

FIRST Step Consider the formula

σ = \frac{t p - t 0}{6}

Next Step Substitute values of Variables

∴

σ = \frac{10d - 2d}{6}

Next Step Prepare to Evaluate

∴

σ = \frac{10 - 2}{6}

Next Step Evaluate

∴

σ = 1.33333333333333

LAST Step Rounding Answer

∴

σ = 1.3333

Standard Deviation of Activity Formula Elements

Variables

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

Pessimistic Time

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

Symbol: t_p

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Pessimistic Time

Optimistic Time

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

Symbol: t₀

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Optimistic Time

Other Formulas to find Standard Deviation

Go Standard Deviation given Probability Factor

σ = \frac{T s - t e}{Z}

Other formulas in Project Evaluation and Review Technique category

Go Mean or Expected Time

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

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}

How to Evaluate Standard Deviation of Activity?

Standard Deviation of Activity evaluator uses Standard Deviation = (Pessimistic Time-Optimistic Time)/6 to evaluate the Standard Deviation, The Standard Deviation of Activity formula is defined as a measurement of uncertainty which is approximately one-sixth of the time range. Standard Deviation is denoted by σ symbol.

How to evaluate Standard Deviation of Activity using this online evaluator? To use this online evaluator for Standard Deviation of Activity, enter Pessimistic Time (t_p) & Optimistic Time (t₀) and hit the calculate button.

FAQs on Standard Deviation of Activity

What is the formula to find Standard Deviation of Activity?

The formula of Standard Deviation of Activity is expressed as Standard Deviation = (Pessimistic Time-Optimistic Time)/6. Here is an example- 1.333333 = (864000-172800)/6.

How to calculate Standard Deviation of Activity?

With Pessimistic Time (t_p) & Optimistic Time (t₀) we can find Standard Deviation of Activity using the formula - Standard Deviation = (Pessimistic Time-Optimistic Time)/6.

What are the other ways to Calculate Standard Deviation?

Here are the different ways to Calculate Standard Deviation-

Standard Deviation=(Scheduled Time-Mean Time)/Probability Factor

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Standard Deviation of Activity Formula

​GoStandard Deviation given Probability Factor Formula

Standard Deviation of Activity Example

Standard Deviation of Activity Solution

Standard Deviation of Activity Formula Elements

Other Formulas to find Standard Deviation

Other formulas in Project Evaluation and Review Technique category

How to Evaluate Standard Deviation of Activity?

FAQs on Standard Deviation of Activity

Variable Name

GoStandard Deviation given Probability Factor Formula