Triple constrain

Triple Constraint- At the end of the upfront definition and planning process of your project you should have you should han agreement with your sponsor.

On the work that will be completed and the cost and duration that are needed to complete the work.

These items then form a concept called the “triple constraint”. They key aspect of the triple constraint is that if one of the three items change, at least one, if not both, of the other items need to change as well.

The triple constraint is actually written a couple similar ways.

The cost item can also be referred to as effort, which makes more sense if the labor costs are all internal and if there are not nonlabor costs.

Sometimes, the scope item is referred to as quality, which then focuses on delivering a certain quality level for a certain cost and duration.This is a more narrow aspect of the triple constraint, but the general concepts still hold true.

This concept is easy to visualize if you think of the triple constraint as a triangle, with the sides representing cost, duration and scope of work.

If the scope of work increases, the cost and / or deadline must increase as well. This makes sense. If you have more work to do, itwill take more cost (effort) and perhaps a longer duration. (Likewise if you reduce the scope of work, the cost (effort) and / or thedeadline should decrease as well.)

If you are asked to accelerate the project and complete it earlier than scheduled, it would also be logical to ask for less work. Howeverif you are asked to deliver the same work for less duration, the third leg of the triple constraint must increase to maintain the balance.

This should also make sense.You will need to increase costs (effort), perhaps by working overtime hours or perhaps bringing in more resources to complete the same amount of work earlier.

Unified modeling language


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