Use the Values in the Table to Calculate Activity Durations

question 63

Essay

Use the values in the table to calculate activity durations and variances for the project.What is the likelihood of finishing this project within 47 days? $$\begin{array} { | l | l | l | l | l | } \hline \text { Activity } & \text { Predecessor } & \text { Optimistic } & \text { Likely } & \text { Pessimistic } \\\hline \text { A } & - & 5 & 8 & 11 \\\hline \text { B } & \text { A } & 15 & 20 & 25 \\\hline \text { D } & \text { A } & 7 & 9 & 12 \\\hline \text { D } & \text { A } & 12 & 16 & 20 \\\hline \text { F } & \text { B, D } & 8 & 11 & 15 \\\hline \text { G } & \text { C } & 13 & 17 & 22 \\\hline\end{array}$$

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Definitions:

Composite Volcano

A type of volcano characterized by eruptions that have both explosive and effusive segments, often creating steep profiles with layered structures resulting from alternating lava flows, ash, and other volcanic debris.

Caldera

A caldera is a large, depression-like feature that forms following the eruption and collapse of a volcano, often containing a lake or new volcanic vents.

Gas Bubbles

Pockets of gas trapped within solid substances, including erupting lava, which can expand and rise due to lower density compared to the surrounding material.

Moderate Depths

Refers to an intermediate level of depth, neither shallow nor deep, often used in the context of bodies of water or geological features.