Construction Project Management
Planning & Scheduling
Bar Charts
Building a CPM Schedule
Networks & Logic
CPM Scheduling
Logic Relationships & Precedence Networks
Progress Updating

The Project as a Network

[Whiteboard session:] A CPM schedule is truly a logic network of inter-related work packages. Let Dr. Mubarak bring this concept to light in this whiteboard session.

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Welcome back. Now, we have introduced the steps to create a schedule and we mentioned that we have to break down the project into activities. We have to assign durations for them and we have to sequence them. The sequencing when you assign predecessors and successors would make the formation of a network. The term network, and it's supposed to be logic network, but for short we say network, it is a combination of activities and relationships. So there are nodes and arrows in that network.

So what is a network? For us, a network is a graphical representation of the activities and events comprising the project in a logical and chronological depiction. Networks are two types. There are the arrow networks and the node networks and node networks we have the basic networks with only one type of relationship and then we have the advanced node networks with four types of relationship.

So first, we're talking about arrow networks. Arrow networks were developed with the critical path method and for some time, for over 20 years, they were the only way to schedule a project. And the term "arrow networks" came from the fact that an arrow represents an activity. So here's the activity, let's call it activity A, and it takes five days, but how would we sequence activities and how would we relate activity A to activity B and so on? So we have also nodes. We need to have n...

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