1. Draw a network model by hand and complete the schedule through forward and backward calculations. 2. Propose SLACK and main path (CP) 3. After removing the last E activity (repeated problem error) suggested in the time estimate of No. 5, you must manually set a specific completion date to obtain the probability. 4. To find the probability by setting a specific completion date means to calculate the main route and then determine the specific date by yourself to find the probability of completion. (For example, when CP = 30, it means to calculate the probability of ending on the 35th (determined by the person)

Activity Explanation Predecessor work A Design brochures and course guides B Screening of prospective teachers Preparing a detailed process overview D Send booklet and application form A E Send teacher application form B F Final selection of teachers of the course CE G Student registration D H Selection of course materials F I Order and receive textbooks GH J Classroom preparation G Time estimate(day) Optimism Top priority 5 7 Activity A Pessimism 8 6 8 4 3 11 12 5 25 17 8 10 12 - Imooo 3 4 5 4 8 9 5 7 9 8 11 17 J 4 4 4