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Work Breakdown Structure1Dr. Hesham A. AzizDr. Hesham A. Aziz
Key Points:•The WBS subdivides the project into manageable work packages.•on fixed price contract the WBS helps to ensure the quotation include the full scope of work.•The WBS numbering system uniquely identifies all the work packages.2Dr. Hesham A. Aziz
Dr. Hesham A. Aziz3The top-down strategic approach to project planningThe top-down strategic approach to project planning
The purpose of the work breakdown structure (WBS) is to subdivide the scope of work into manageable work packages that can be estimated, planned and assigned to a responsible person or department for completion. The breakdown should group similar work together to improve productive efficiency.The main components of the WBS that will be discussed in this chapter are:•Structure•Methods of subdivision•Numbering or coding system•Level of detail •Number of WBS Levels•Roll-up•Integrating the WBS/OBS to assign responsibility.Work Breakdown Structure4Dr. Hesham A. Aziz
Creating the Work Breakdown StructureCreating the Work Breakdown Structure•Work Breakdown Structure (WBS)–An hierarchical outline (map) that identifies the products and work elements involved in a project.–Defines the relationship of the final deliverable (the project) to its sub-deliverables, and in turn, their relationships to work packages.–Best suited for design and build projects that have tangible outcomes rather than process-oriented projects.5Dr. Hesham A. Aziz
Hierarchical Breakdown of the WBSHierarchical Breakdown of the WBS6Dr. Hesham A. Aziz
Work Package:Work package including the following•Specifications•Quality requirements•Estimate (man hours) •Budgets•Duration•Procurement•Resources•Equipment requirements7Dr. Hesham A. Aziz
WBS/Work Packages to NetworkFrom Work Package to NetworkFrom Work Package to Network8Dr. Hesham A. Aziz
1. The WBS StructureThere are tow methods of presenting the WBS:•Graphically in boxes.•Text indents.The WBS is a hierarchical structure which is best presented by a graphical subdivision of the scope of work in boxes.HouseCivilPlumbingElectricalWiringAppliancesPipingSewerageFoundationsWalls/RoofHouse Project WBS Subdivided into Boxes9Dr. Hesham A. Aziz
The other method of presentation shows the scope of work as text indents, where each level is tabbed to represent its level in the hierarchy.1.0.0 House Project1.1.0Civil1.1.1Foundations1.1.2Walls and roof1.2.0Plumbing1.2.1Piping1.2.2Sewerage1.3.0Electrical1.3.1Wiring1.3.2Appliances10Dr. Hesham A. Aziz
WBS CodingWBS Coding11Dr. Hesham A. Aziz
2. Method of Sub-DivisionThere is not necessarily a right or wrong structure because what may be an excellent fit for one discipline may be an awkward burden for anther.