WBS-Construction of House Lecture by Junaid Arshad Department

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WBS-Construction of House Lecture by Junaid Arshad Department of Engineering Management Abridged and adapted by A. M. Al-Araki, sept. 2013 1. WBS-Construction of House (Example) 2. WBS Dictionary 3. Organization Breakdown Structure (OBS) Decide individual tasks necessary to complete the house 1

The individual tasks necessary to complete the house. Level 1: is the highest level (ACME) where the project (house) will be summarized. NOTE: We assume that the design is complete, all permits issued, all material ordered and inspection happens • Level 2 is identified at the project level: House. It correspond to Level 1. In this case, the code is 1. 1. Level 1 Level 2 2

n n n Divide the work into the major elements needed to build a house. You divide Level 3 into six elements: concrete, framing, plumbing, electrical, interior and roofing. These are both major deliverables and milestones for managing the project. They also enable the project by task. Each codes at level 3 is unique to the project and starts with the WBS code from the level above (1 1. 1. 1). Do we need another level? Level 1 Level 2 Level 3 3

Level 4 of the WBS will enable us to manage the project as desired. All of our contractors fit into specific elements at level 4, and so do all specific departments. Organization Breakdown Structure (OBS) n The WBS is complete. It does include the necessary components to manage the project by task. Level 1 Level 2 Level 3 Level 4 4

Housing Corporation 1. 1 New Home Construction 1. 1. 1 Concrete 1. 1 Pour Foundation 1. 1. 1. 2 Install Patio 1. 1. 1. 3 Pour Stairway 1. 1. 2 Framing 1. 1. 2. 1 Frame Exterior Walls 1. 1. 2. 2 Frame Interior Walls 1. 1. 2. 3 Install Roofing Trusses 1. 1. 3 Plumbing 1. 1. 3. 1 Install Water Lines 1. 1. 3. 2 Install Gas Lines 1. 1. 3. 3 Install B/K Fixtures 1. 1. 4 Electrical 1. 1. 4. 1 Install Wiring 1. 1. 4. 2 Install Outlets/Switches 1. 1. 4. 3 Install Fixtures 1. 1. 5 Interior 1. 1. 5. 1 Install Drywall 1. 1. 5. 2 Install Carpets 1. 1. 5. 3 Install Painting 1. 1. 6 Roofing 1. 1. 6. 1 Install Felt 1. 1. 6. 2 Install Shingles 1. 1. 6. 3 Install Vents 5

WBS Dictionary The WBS dictionary is a narrative documentation of the effort needed to accomplish all work defined in the WBS. The WBS dictionary is developed for the lowest level element in the WBS only. To better understand how a WBS and a WBS dictionary work, let’s compare it to a book and the book’s table of contents: ¨ The WBS is the table of contents for the project. It captures the contents in an organized fashion (chapters, subchapter). ¨ The WBS dictionary is the book itself. It tells the story. In our case the story is what work will be accomplished and what outputs will be produced in each of the WBS elements. The total of these descriptions is how a house will be built and what is needed to build the house. The WBS dictionary will often lead to the development of the Scope of work (SOW) for the project. 6

WBS Dictionary n WBS Dictionary describes each component of the WBS e. g. ¨ Milestone ¨ Deliverables ¨ Activities ¨ Scope ¨ Resources ¨ Quality ¨ Cost ¨ Sometime dates 7

Organization Breakdown Structure (OBS) n Develop the Organizational Breakdown Structure (OBS) for the project. This indicates the organizational relationships and is used as the framework for assigning work responsibilities. See next slide. n The OBS is structured by Responsible Department and then by Performing Department at the lowest level. This Performing Department level is where the responsibility and resource needed to accomplish the project will be assigned. n With the relationships and responsibilities defined, second and final step is to merge the WBS and OBS. 8

Organization Breakdown Structure (OBS) PROJECT OFFICE RESP DEPT B. Smithers CIVIL STRUCTURAL ELECTICAL PLUMBING RESP DEPT R. Kelly P. Tate J. Sims R. Lee CONCRETE CARPENTRY PERF DEPT 6010 WIRING WATER/SEWER PERF DEPT 5010 PERF DEPT 4010 PERF DEPT 3010 M. Manning R. Sites S. Johnson K. Wells MASONRY ROOFING HOOKUP/TIE-IN GAS PERF DEPT 6020 PERF DEPT 5020 PERF DEPT 4020 T. Greams Y. Taylor TEST DRYWALL PERF DEPT 6030 R. Oriely PERF DEPT 5030 K. Neumann P. Ottis PERF DEPT 3020 D. Smith 9

WBS-Construction of House cont. • Earlier topics: [WBS], [Dictionary of WBS] and [OBS] Continuation: • Responsibility Assignment Matrix (RAM) • Technical Approach, Scope of Work, Specifications, Risk • Management and Resource Allocation based on WBS • Multiple Ways to Develop WBS • The 100% Rule 10

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