Four Squares Productions, a firm hired to coordinate the release of the movie Pirates of the Caribbean: On Stranger Tides (starring Johnny Depp), identified 14 activities to be completed before the release of the film. The tasks in weeks are provided in Table 4.1.
| ACTIVITY | IMMEDIATE PREDECESSOR | TIME (DAYS) |
| A | - | 6 |
| B | - | 2 |
| C | A | 6 |
| D | A | 8 |
| E | B,C | 9 |
| F | D | 3 |
| G | D | 6 |
| H | E,F | 4 |
| I | G,H | 6 |
| J | I | 5 |
| K | I | 9 |
| L | J | 4 |
| M | K | 2 |
| N | L,M | 8 |
1. How many weeks in advance of the film release should Four Squares have started their marketing campaign?
2. Which are the activities that need to be prioritised to deliver the marketing campaign project within the expected time?
3. If activities M and N were not necessary, what impact would this have on the critical path and the number of weeks needed to complete the marketing campaign?