The Critical Path Method is a method of managing activities in a project so as to maximize time. In the case of A, B and C activities, since they are connected with the same start-to-start and finish-to-finish, it means that the activities are linked and as such the duration of the project is 10 days since the last activity will take 10 days to finish.
The implication between SS and FF in the activities means that they start up at the same time in the CPM and while activity A ends at 5 days, C proceeds to 10 days.
Well in order to run the business no matter which type it is there is a need for revenue, not profit, unless it is private. For public school revenue comes from the State and when a local shop sponsor.
