The first displayed crash shortens the baseline critical path at the cheapest available rate.

highlighted = computed this step

Crash B

On the baseline critical path, B has the cheapest crash cost per day.

choose B on the baseline critical path\text{choose B on the baseline critical path}
Displayed crash planEach row is recomputed after applying the next displayed crash.displayed crash plandeadline 6activity crash dataactnormalmaxcost/dayA213B422C315D214path lengths after each recomputestateA-B-DA-C-Dcostbaseline8*70crash B7*7*2crash D6*6*6asterisk marks a recomputed critical pathdisplayed plan cost 6exact minimum cost 5final duration 6recompute critical paths after every crash

One day

Crash B by 1 day.

ΔB=1\Delta_B=1
Displayed crash planEach row is recomputed after applying the next displayed crash.displayed crash plandeadline 6activity crash dataactnormalmaxcost/dayA213B422C315D214path lengths after each recomputestateA-B-DA-C-Dcostbaseline8*70crash B7*7*2crash D6*6*6asterisk marks a recomputed critical pathdisplayed plan cost 6exact minimum cost 5final duration 6recompute critical paths after every crash

B crash cost

The added cost is 2.

added cost=2\text{added cost}=2
Displayed crash planEach row is recomputed after applying the next displayed crash.displayed crash plandeadline 6activity crash dataactnormalmaxcost/dayA213B422C315D214path lengths after each recomputestateA-B-DA-C-Dcostbaseline8*70crash B7*7*2crash D6*6*6asterisk marks a recomputed critical pathdisplayed plan cost 6exact minimum cost 5final duration 6recompute critical paths after every crash

Recompute

After crashing B, both paths have length 7.

TABD=TACD=7T_{ABD}=T_{ACD}=7
Displayed crash planEach row is recomputed after applying the next displayed crash.displayed crash plandeadline 6activity crash dataactnormalmaxcost/dayA213B422C315D214path lengths after each recomputestateA-B-DA-C-Dcostbaseline8*70crash B7*7*2crash D6*6*6asterisk marks a recomputed critical pathdisplayed plan cost 6exact minimum cost 5final duration 6recompute critical paths after every crash