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Unformatted text preview: divide control package 1 (Foundation) into these packages: 1.1 Site Preparation 1.2 Forms Installation & Removal 1.3 Rebar, Mesh, & Anchors 1.4 Concrete Pour, Cure, & Finish Similarly, we subdivide control package 2 into these packages: 2.2 Sheetrock Tape, Bed, & Float 2.3 Roofing 2.4 Painting 3.1 Plumbing 3.2 Electrical 3.3 HVAC (Heating, Ventilation, and Air -conditioning) This finer decomposition of the work content is shown in Figure 2-2. For the purpose of keeping the example small, we TE And we subdivide control package 3 into these packages: AM FL Y
Team-Fly® 2.1 Framing & Misc. Carpentry Page 20 Figure 2-2. WBS for example project. assume that we have now decomposed the work far enough for the needs of project planning and control. In other words, we believe that these latest packages are small enough to be work packages. We could have had additional levels of control packages between the top-level control package and the work packages, but, for the sake of simplicity, the example project stops here. In what follows we will refer to any of these packages as control packages but to only the lowest-level packages (e.g., 1.1, 1.2, 1.3) as work packages. This structure of control packages we have just described for the example project is referred to as the Work Breakdown Structure or simply the WBS , for the project. The hierarchical diagram in Figure 2 -2 represents the example WBS. There are other meaningful subdivisions of the work besides the work breakdown structure. Subdividing the work by discipline (craft) may be useful for supporting monthly labor reporting; for example, electrical or carpentry or masonry activities could be grouped together. It is often necessary to have the work subdivided by organizational structure (e.g., by division, Page 21 department, or section). These organizational subdivisions are so common that they are often given the name Organizational Breakdown Structure or OBS. It is also standard practice to subdivide the work by cost codes to support cost accounting and by general ledger codes to support general accounting or tax form preparation. Such subdivisions are often referred to as cost breakdown structures . Finally, in many industries, especially those that do business with the federal government, the work may need to be broken down along product lines, such as the various subsystems of an overall system (e.g., the avionics subsystem and the flight control system of an aircraft). Such subdivisions are referred to as product breakdown structures . The military, as we see in Chapter 8, refers to these product breakdown structures as work breakdown structures. Whatever the need for these additional subdivisions of work, it is important that they be related in a meaningful way to the WBS. In the example project we will consider three different subdivisions. In addition to the WBS, there will be a cost breakdown based on General Ledger (GL) codes and an organizational breakdown structure. The discussion in the...
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- Spring '10