A Network Consists of the Following List A Draw the Network Diagram

question 75

Essay

A network consists of the following list. Times are given in weeks.
$\begin{array}{|c|c|c|c|c|}\hline\text { Activity } & \text { Preceding } & \text { Optimistic } & \text { Probable } & \text { Pessimistic } \\\hline \text { A } & -- & 5 & 11 & 14 \\\hline \text { B } & - & 3 & 3 & 9 \\\hline \mathrm{C} & -- & 6 & 10 & 14 \\\hline \mathrm{D} & \mathrm{A}, \mathrm{B} & 3 & 5 & 7 \\\hline \mathrm{E} & \mathrm{B} & 4 & 6 & 11 \\\hline \mathrm{F} & \mathrm{C} & 6 & 8 & 13 \\\hline \mathrm{G} & \mathrm{D}, \mathrm{E} & 2 & 4 & 6 \\\hline \mathrm{H} & \mathrm{F} & 3 & 3 & 9 \\\hline\end{array}$
a. Draw the network diagram.
b. Calculate the expected duration and variance of each activity.
c. Calculate the expected duration and variance of the critical path.
d. Calculate the probability that the project will be completed in less than 28 weeks.

---

Definitions:

Spam

Unsolicited digital messages, often of a commercial nature, sent in bulk to a large number of recipients.

Electronic Junk Mail

Unsolicited digital communication, often in the form of emails, that promotes products or services, typically considered spam.

Unsolicited E-Mail

Emails sent without the recipient's consent, often containing advertisements or promotional material; commonly referred to as spam.

Lesions

Any abnormal damage or change in the tissue of an organism, usually caused by disease or trauma.