How critical path and slack time are defined and calculated
Steps to use the critical path method
1) Draw a network diagram, with nodes marking events and arrows representing tasks. This gives an overall overview of the entire project. It is customary for projects to start on the left and end on the right.
2) Mark the number of each assignment on the arrowDuration(T)
3) Starting from the left, calculate the earliest end time (EF) of each job. This time is equal to the earliest possible start time (ES) plus the duration of the job.(Forward calculation calculates the earliest start and earliest end)
4) When all calculations are completed, the final calculated time is the time required to complete the entire project.
5) Starting from the right, determine the latest end time (LF) of each job based on the duration of the entire project. Subtract the job's duration from the latest end time to get the latest start time (LS).(The backward calculation method calculates the latest end and the latest start)
7) The difference between the latest end time and the earliest end time of each job, or the latest start time and the earliest start time, is the time difference of the job == [Slack Time] ==.
8）If the time difference for an operation is zero, then the operation is on the critical path.
9) of the projectGuanjian RouteIt is the route where the time difference of all operations is zero.
Application of critical path method in project management:
For a project, the project can only end after the longest or most time-consuming activity in the project network is completed. This longest activity route is called the critical path.