One shortcoming of the PERT/CPM network method is that it does not allow for leads and lags between two activities without greatly increasing the number of sub-activities to account for this. In construction projects, in particular, it is extremely common for the following restrictions to occur.
• Activity B must not start before activity A has been in progress for at least two days (Figure 8-24a).
• Activity A must be complete at least three days before activity B can be finished (Figure 8-246).
• Activity B cannot begin before four days after the completion of A (Figure 8-24c).
• Activity B cannot be completed before eight days from the start of A (Figure 8-24 d).
Precedence diagramming is an AON network method that allows for these leads and lags within the network. Node designations are illustrated in Figure 8-24«. Because of the increased flexibility regarding required lead and lag times, it must be a. Start to start
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What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.