Use the Values in the Table to Calculate Activity Durations

question 61

Essay

Use the values in the table to calculate activity durations and variances for the project.Which path is critical? How closely should the other path be watched and why?
$$\begin{array} { | l | l | l | l | l |} \hline\text { Activity } & \text { Predecessor } & \text { Optirnistic } & \text { Likely } & \text { Pessirnistic } \\\hline \text { A } & -- & 4 & 6 & 10 \\\hline B & \text { A } & 2 & 5 & 8 \\\hline \mathrm { C} & \text { A } & 6 & 7 & 9 \\\hline \mathrm { D } & \mathrm { B } & 3 & 9 & 20 \\\hline \mathrm { E } & \mathrm { C } & 7 & 9 & 11 \\\hline \mathrm { F } & \mathrm { D } , \mathrm { E } & 7 & 11 & 19 \\\hline\end{array}$$

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Definitions:

Latin Square

A technique to control for order effects without having all possible orders.

Counterbalanced

A method used in experiments to minimize the effects of order in the presentation of stimuli by varying the sequence among participants.

Conditions Presentation

The method or order in which experimental conditions are presented to participants in a study.

Latin Square

A statistical design used in experiments to control for two confounding variables, arranging treatments in a square matrix.