ID Description Predecessor "Time

$($days$)"$

A Systems None $7$

B Subsystem A design A $2$

C Subsystem B design A $2$

D Subsystem C design A $2$

E Program A B $3$

F Program B C $3$

G Program C D $3$

H Subsystem A E $4$

I Subsystem B F $4$

J Subsystem C G $4$

K Integration H$,$ I, J $3$

L Integration test K $5$