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

question 58

Essay

A network consists of the following list. Times are given in weeks.
$$\begin{array} { | c | c | c | c | c | } \hline \text { Activity } & \text { Preceding } & \text { Optimistic } & \text { Probable } & \text { Pessimistic } \\\hline \mathrm { A } & - - & 5 & 11 & 14 \\\hline \mathrm { B } & - & 3 & 3 & 9 \\\hline \mathrm { C } & - - & 6 & 10 & 14 \\\hline \mathrm { D } & \mathrm { A } , \mathrm { B } & 3 & 5 & 7 \\\hline \mathrm { E } & \mathrm { B } & 4 & 6 & 11 \\\hline \text { F } & \mathrm { C } & 6 & 8 & 13 \\\hline \text { G } & \mathrm { D } , \mathrm { E } & 2 & 4 & 6 \\\hline \mathrm { H } & \mathrm { F } & 3 & 3 & 9 \\\hline\end{array}$$ 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:

Glaucoma

A group of eye conditions that can cause blindness by damaging the optic nerve, often associated with high intraocular pressure.

Aqueous Humor

Watery, clear solution that fills the anterior and posterior chambers of the eye.

Suspensory Ligament

A fibrous tissue that connects the lens of the eye to the ciliary body, adjusting the lens's shape for focusing.

Cones

Photoreceptor cells in the retina of the eye responsible for color vision.