Determining the Activity Dependencies

The progression of the project is built on the sequence of activities. In other words, predecessor activities must be complete before successor activities can begin. The following are the dependencies you should know for your CAPM or PMP exam:

• Mandatory dependencies These dependencies are the natural order of activities. For example, you can't begin building your house until your foundation is in place. These relationships are called hard logic.

• Discretionary dependencies These dependencies are the preferred order of activities. Project managers should use these relationships at their discretion and document the logic behind the decision. Discretionary dependencies allow activities to happen in a preferred order because of best practices, conditions unique to the project work, or external events. For example, a painting project typically allows the primer and the paint to be applied within hours of each other. Due to the expected high humidity during the project, however, all of the building will be completely primed before the paint can be applied. These relationships are also known as soft logic, preferred logic, or preferential logic.

• External dependencies As the name implies, these are dependencies outside of the project's control. Examples include the delivery of equipment from a

vendor; the deliverable of another project; or the decision of a committee, lawsuit, or expected new law.

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Project Management Made Easy

Project Management Made Easy

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.

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