A Partially Solved PERT Problem Is Detailed in the Table

question 36

Essay

A partially solved PERT problem is detailed in the table below. Times are given in weeks.
(a) Calculate the expected time and variance for each activity. Enter these values in the appropriate columns in the table above.
(b) Which activities form the critical path?
(c) What is the estimated time of the critical path?
(d) What are the project variance and the project standard deviation?
(e) What is the probability of completion of the project before week 42?

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Definitions:

Transcription

The process by which the genetic information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA).

mRNA

Messenger RNA, a type of RNA that is transcribed from DNA and carries instructions for synthesizing proteins to the ribosomes.

Ribosome

Ribosomes are molecular machines within cells that synthesize proteins by translating messenger RNA into polypeptide chains, essential for all cellular functions.

Polypeptide Chain

A long, continuous, and unbranched chain of amino acids linked by peptide bonds that forms part of the structure of proteins.