Identify the days when the resource is over-allocated. First, to determine the schedule of each activity based on their dependencies and calculate the total crane demand on each day. Schedule (Start and Finish Days for Activities) Activity A starts on Day 1 and finishes on Day 3 (Duration: 3 days) Activity B starts immediately after A, on Day 4, and finishes on Day 5 (Duration: 2 days) Activity C starts immediately after B, on Day 6, and finishes on Day 10 (Duration: 5 days) Activity D also starts after B, on Day 6, and finishes on Day 9 (Duration: 4 days) Activity E starts immediately after C, on Day 11, and finishes on Day 19 (Duration: 9 days) Activity F can start after both C and D finish; the earliest start is after C (Day 11) or D (Day 10); hence starts on Day 11 and finishes on Day 12 (Duration: 2 days) Activity G starts after both E and F, which means starting on Day 20 and finishing on Day 20 (Duration: 1 day)