Presentation on theme: "Prof Awad S. Hanna Work Breakdown Structure WBS Work Breakdown Structure WBS."— Presentation transcript:
Prof Awad S. Hanna Work Breakdown Structure WBS Work Breakdown Structure WBS
Prof Awad S. Hanna Work Breakdown Structure (WBS) A hierarchical system which sub-divides larger elements of the project into smaller elements. The smallest unit of the WBS is the work package.
Prof Awad S. Hanna Work Breakdown Structure Example Level Level Description 1 Total Project 2 Subproject 3 Category of Work 4 Work Package 5 Resources Work Breakdown Structure Masonry Wall Floor Slab FootingSitework Interior Finishes Roof System Steel Columns & Joints Place Footings Form & Reinforce Footings Excavate Footings Equipment Material Labor Masonry Wall Mobilization/ Demobilization Administration Roof System Steel Columns & Joints Warehouse
Prof Awad S. Hanna W ORK B REAKDOWN S TRUCTURE (cont.) The scope of work in each work package should be defined to avoid overlaps and omissions between work packages. Work packages should be defined in terms of design, construction methods, and completion requirements, with associated performance dates
Prof Awad S. Hanna Scope of Work Packages Each work packages should be: 1. Manageable Specific authority and responsibility can be assigned. 2. Independent With minimum interfacing or dependence on other elements. 3. Measurable In terms of progress.
Prof Awad S. Hanna The Project Cost System Objectives of Establishing Project Cost System. 1. Keep the construction costs of the project within the established budget. 2. Develop labor and equipment productivity information for estimating the cost of future work.
Prof Awad S. Hanna Cost Code 9708B Project Number Area Code Work Type Code Distribution Code Cost Code for stripping concrete formwork for bridge deck (Labor).
Prof Awad S. Hanna Project Number Eighth project in 1997 (Bridge) 9708B
Prof Awad S. Hanna Area Code Geographic location OR Associate Field Cost to Specific supervisor or Management 9708B
Prof Awad S. Hanna Work Type Code 03Concrete 0315Concrete Formwork 03157Wood Concrete Formwork Wood Concrete Formwork for Deck Wood Concrete Formwork for Abutment 9708B
Prof Awad S. Hanna Distribution Code 9708B Total 2. Material 3. Labor 4. Equipment 5. Sub-Contract
Prof Awad S. Hanna Cost Code and Cost Control All items of expense are charged to the project where they are incurred. "General" or "miscellaneous" cost accounts should not be used, is poor practice, and should be avoided. The cost code is to serve its basic purpose, it must be understood and used consistently by all company personnel.
Prof Awad S. Hanna C OST A CCOUNTING R EPORTS Cost report intervals are a function of the project size, nature of the work, and the type of contract involved. There must be a balance between the cost of generating the reports and the value of the management information received
Prof Awad S. Hanna C OST C ODES The most widely used cost codes are Masterformat, CSI (Construction Specifications Institute) Uniformat, UCI (Uniform Construction Index). Masterformat is widely used software companies and government agencies.
Prof Awad S. Hanna Most contractors match their cost control system to their payroll periods and to their time-monitoring system.
Prof Awad S. Hanna C OST C ODES (cont.) Masterformat Has 16 divisions Divisions were developed according to trades Uniformat Has 12 divisions Tends to follow the progress of construction
Prof Awad S. Hanna Relationship Between UNIFORMAT & MASTEFORMAT