Schedule Compression and Time-Cost Trade-Off - Construction Project Scheduling and Control - page 233

Cycle 0 (before crashing)
Path a Duration (days)

ABEH 24

ACEH 25

ACFH 23

ACFG 24

ADG 23

a When the letter representing an activity is crossed, e.g., F, it
means this activity cannot be crashed (such as activity F) or has
reached its minimum/crash duration

Let us prepare the time-cost trade-off calculation table (Figure 8.12). We
have to start with the critical (longest) path: ACEH. We choose activity C
because it costs the least to crash, $40 per day. We cut the duration of C
from 8 days to 7. This action affects three paths: Cycle 1

Figure 8.12 Time-cost trade-off calculation table for example 8.1

Cycle 1
Path Duration (days)

ABEH 24 24

ACEH 25 24

ACFH 23 22

AC FG

24 23

ADG 23 23