I deeply understood what is work (WBS), I modelled it. To work, it is to do something somewhere. And a project, it is an organization which works. The structure of a project thus has 4 dimensions: to do (activities or actions, ABS), something (products, PBS), somewhere (zones, ZBS) and the organization (OBS). The whole evolves in the time, which is the fifth dimension of a project. A project thus has 5 dimensions. Then it is complicated to manage, this is why the projects are often failures. It is thus necessary to structure well information of the projects, in order to find it easily, and to aggregate and consolidate the data on all dimensions. In modeling that I created, the 3DWBS, all dimensions are in relation, they are linked. Then information can circulate of a dimension to another. The 3D WBS thus makes it possible to connect all the elements of a project (costs, time, deliverables, quality, resources, documents, etc.). In other words, one can have an integrated project management if 3D WBS method is applied.
