Exam - 220923

Question 1: ERP System Implementation (A-o-A Network)

• Objective: Implement an Enterprise Resource Planning (ERP) system.

• Method: Activity-on-Arrow (A-o-A) network diagram.

• Critical Path: A-B-D-F-G

• Total Duration: 51 weeks

• Gantt Chart: Visualize the project's time plan.

Question 2: Entrance System Upgrade (A-o-N Network)

• Objective: Replace an aging entrance system with a biometric authentication system.

• Method: Activity-on-Node (A-o-N) network diagram, forward and backward passes.

• Critical Path: A-B-D-F-I

• Project Duration: 40 weeks

• Risk Consideration: 25% chance of discovering design flaws requiring rework.

• Expected Project Duration Calculation:

  • Probability-weighted project duration = (Probability of Scenario 1 * Project duration in Scenario 1) + (Probability of Scenario 2 * Project duration in Scenario 2).

  • Scenario 1 (no rework): 40 weeks.

  • Scenario 2 (rework): 78 weeks (40 weeks initial + 38 weeks rework).

  • 0.75 * 40 + 0.25 * 78 = 49.5 weeks.

Question 3: CPM and PERT

• Common Assumptions:

  • Complete list of activities can be identified upfront.

  • Resources are infinite/not a constraint.

  • No reworks/loops are possible.

  • Activities are statistically independent.

• Logical Dependency:

  • The start/finish of an activity depends on the start/finish of another activity.

• Resource Dependency:

  • The ability to start/execute an activity depends on the utilization/consumption of some shared resources by another activity.