These numbers provide useful guidelines to the Black Belt for breaking the project down to manageable size. True Six Sigma projects are neither too large nor too small. It's rare that the project as it's initially proposed will be the right size.
Projects are usually too big.
The solution is not to abandon lofty goals but to break the problem down into smaller pieces. The WBS is designed to develop work subplans by breaking down the larger project into smaller components. When the work has been accomplished and the results reintegrated, we'll have reached our goal. The creation of work-breakdown structures involves a process for defining the final and intermediate products of a project and their relationships to one another. WBS Creation Process Defining project activities is complex.