A lead time means that Task B doesn’t start until a period of time has elapsed, and a lag time means that Task B starts before Task A finishes. Start to Finish (SF): Task B cannot start until Task A start (this one is rare).Īlso, the tasks do not have to line up exactly.Start to Start (SS): Task B cannot start until Task A starts.Finish to Finish (FF): Task B cannot finish until Task A completes.Finish to Start (FS): Task B cannot start until Task A completes.Hence, if you are in a project management class make sure they are all dependent upon one another. In theory, every task must be dependent on at least one other (except the first task) else it would not be part of the project. Prior to the network diagram, the project manager must have determined the dependencies of each task. If I forced myself to perform each task one after the other, I might be taking too long. Interestingly, several of these tasks can be done in parallel. Tasks should not be too small, or they become prone to micromanagement, or too large, hence they lose the benefit of project control (a large task is no different than a whole project).Ī simple task list for a small convention I recently organized was: Prior to the construction of the network diagram, the project needs to have been broken down into its constituent tasks. Critical path tasks have a float of zero. They cannot finish late, or be moved, or the overall project completion date will change by the same amount.įloat: The amount that a task can move without affecting the completion date of the project.
It is used to determine the critical path, as well as the float of each task.Ĭritical Path: The tasks which define the completion date of the project. In project management, the network diagram is a graphical depiction of a project schedule which uses boxes to represent each task.
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