For a construction project, PERT calculation yield a project duration of 50 weeks with a variance of 25 weeks. The probability of completion of the projectin 63 weeks will be________%, using the below table.Correct answer is '99-99.02'. Can you explain this answer?

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For a construction project, PERT calculation yield a project duration of 50 weeks with a variance of 25 weeks. The probability of completion of the project in 63 weeks will be________%, using the below table.

Correct answer is '99-99.02'. Can you explain this answer?

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For a construction project, PERT calculation yield a project duration ...

Concept:

Probability factor

Where

T_S = Scheduled time required to complete the project

T_E = expected completion time of the project

σ = standard deviation

Calculation:

Expected completion time of the project, T_E = 50 weeks

variance = 25 weeks

Scheduled Completion time of project = 63weeks

∴ standard deviation

Probability factor

z = 2.6

Probability = 97.72 + (2.6 - 2)

Probability = 99.01%

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For a construction project, PERT calculation yield a project duration of 50 weeks with a variance of 25 weeks. The probability of completion of the projectin 63 weeks will be________%, using the below table.Correct answer is '99-99.02'. Can you explain this answer?

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