Using Program Evaluation and Review Technique $($PERT$)$ Determine sigma of TE and Duration Expected.

The Critical Path is given in Table $1.$

$1."$At the End of day $66."$

$2.$ "Within the Day of $66".$

$3."$ Before the Start of Day $67".$

$4.$ Finish the project with probability of $98\%.$

Table $1$

Activity a m b te

B $81012$

D $111115$

F $4911$

G $557$

I $888$

K $7911$

L $588$

M $789$

The Probability of event Xs can be found from Table of Z $($The Central Limit Theorem$).$

Table Z Table Z Table Z Table Z Table Z

Z X$=<$ Ts Z X$=$