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What are the external constraints?

OK, I know what the 3 constraints are in every project: Cost, Time, and Scope. So which one of them is an external constraint (all of them look internal to me)? Are there other constraints which are considered external? And what makes a constraint external?
asked 10 years ago by anonymous

2 Answers

I think, as the below answer states, you mean external factors (that have nothing to do with the company itself) that may hinder the progress of the project. Such external factors may include:

- New Regulations: New regulations may wreak havoc on a project. For example, when the ban of offshore drilling was imposed, all the projects related to that industry were killed or postponed.  
- Instability in the supply chain: Sometimes vendors do not deliver the material on time, and this affects the project
- Recession: There will be a very high chance, in case of a recession, that the project (once done) will not return the predicted ROI.
- Country instability: for example, because of the turmoil in the Middle East, a lot of projects are being put on hold

Other external factors include: Unions, natural disasters, inflation, competition, etc...
answered 10 years ago by MaplePM (46,940 points)
I've searched the PMBOK Guide and several other documents and cannot find the term "external constraints".  I do know that each of the three constraints may have internal and external components.  For example, scope changes may originate internally (e.g. suggested by a team member) or externally (suggested by the buyer).  I've found terms like "external factors", but not external constraints.  If you can put more context around the term, it might be helpful to getting you the best answer.
answered 10 years ago by sdcapmp (45,840 points)

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