Case Study: Pipeline Construction (Antill, 1990)

Case Study: Pipeline Construction (Antill, 1990)

Draw up Gantt Chart with utility data1

Click Plot AOA2 -to automatically draw an editable Activity-on-Arrow Network Diagram with critical path for normal schedule, via

This diagram should aid you in fully considering the project plan as distinct from the project schedule (although it does also define the critical path). After network compression the critical path may change.

Automatically revised Gantt Chart – fully crashed (after running Plot TimeCostCurve App)

Click and follow the prompts: Plot TimeCostCurve3

Click Plot AOA (for revised fully-crashed network diagram)

CONGRATULATIONS! In a few clicks you just solved the time-cost problem.

DAYS AND DOLLARS: By inspection you now know the optimal schedule can save this project 22 work days (18% time saving) and $2,365 (6.5% cost saving) by crashing the activities as noted by their ID’s on the TimeCostCurve above (by 1 or more days).

The critical path for the fully crashed schedule is indicated in the AOA network diagram (left)

You also have summary data of 23 schedules to justify your next project planning decision.

Disclaimer: apps are not intended for narrow use cases but rather to draw you into solving one of the broadest problems in project planning


  1. Utility data is available for import into tccB01.mpp file from:↩︎

  2. Plot AOA app available from the ribbon of tccB01.mpp file: ↩︎

  3. Plot TimeCostCurve app available from the ribbon of tccB01.mpp file↩︎

  4. References:

    Antill, J. M. (1990). Critical Path Methods in Construction Practice Fourth Edition. John Wiley & Sons Inc. p.57↩︎