Estimate the efficiency of bulldozer for the following for the following operating conditions:

$($a$)$ Material$-$ Sandy loam top soil

Activity DURATION, WEEKS Immediate

Most Predecessor

likely

Optimistic Pessimistic

A $428$

B $7315$ A

C $444$ A

D $11523$ B$,$ C

E $8416$ B

F $6315$ D$,$ E

G $555$ D

Activity Normal

Duration

$($Days$)$

Norma

l cost

$($Rs$.)$

Crash

Duration

$($days$)$

Crash

Cost

$($Rs$.)$

A $86000412000$

B $42000214000$

C $10400048000$

D $640004800$

$1$

$2$

$3$

$4$

$($b$)$ Swell$-25\%$

$($c$)$ Haul distance$-45$ m

$($d$)$ Mould board size$-3\mathrm{.}0$ m long, $1\mathrm{.}0$ m high

$($e$)$ Rated mould board capacity$-3$ cu$.$m loose volume

$($f$)$ Operating factor$-50$ min$/$hr

$($g$)$ Probable round trip time $1\mathrm{.}87$ min