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

Logic Relationships and Precedence Networks

As we move into a more advanced topic, Saleh discusses Precedence Networks or Diagrams, sometimes called PDM. This type of network accommodates all 4 relationships in CPM Scheduling and the discussion revolves around good logic linking.

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All right. Hello, again. We're going to start an advanced topic now. It's called precedence diagrams and it's kind of advanced form of node networks. It has couple of names, precedence networks, precedence diagrams, PDM, which stands for Precedence Diagramming Method. It is, in fact, a node diagram, but the only difference that makes it an advanced type is that it accommodates four types of relationships. And we're going to be talking about those four relationships, they are finish to start, start to start, finish to finish and start to finish.

Practically from my experience, my 26 plus years of experience, I've found that the first activity, this one is the one that's most used. And I'll probably tell you later in this course that my attitude through the years of experience has shifted a little bit, I wouldn't say changed completely, from using this less and focusing on these to going back to the finish to start because it's very simple. It's very simple in calculations. It's also simpler I found in delay claim analysis and other type of functions that we want to do to the schedule.

Those two relationships are nevertheless are still important. The start to start and finish to finish, they indicate a relationship that one activity, the successor cannot start until the predecessor has started. But usually, and most likely there is a lag. And we call them ove...

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