Work Breakdown Structure WBS

1. Work Breakdown Structure WBS DR. Nabil Dmaidi

2. 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. DR. Nabil Dmaidi

3. Work Breakdown Structure Example Level Work Breakdown Structure Level Description 1 Warehouse Total Project 2 Administration Mobilization/ Demobilization Masonry Wall Steel Columns & Joints Roof System Subproject 3 Sitework Footing Floor Slab Masonry Wall Steel Columns & Joints Roof System Interior Finishes Category of Work 4 Excavate Footings Form & Reinforce Footings Place Footings Work Package 5 Labor Material Equipment Resources DR. Nabil Dmaidi

4. WORK BREAKDOWN STRUCTURE (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 DR. Nabil Dmaidi

5. 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. DR. Nabil Dmaidi

6. 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. DR. Nabil Dmaidi

7. Cost Code • Cost Code for stripping concrete formwork for bridge deck (Labor). Work Type Code Project Number Area Code Distribution Code 9708B 05 03157.20 3 DR. Nabil Dmaidi

8. Project Number • Eighth project in 1997 (Bridge) 9708B05 03157.20 3 DR. Nabil Dmaidi

9. Area Code • Geographic location OR • Associate Field Cost to Specific Supervisor or Management 9708B0503157.20 3 DR. Nabil Dmaidi

10. Work Type Code 9708B 0503157.203 03 Concrete 0315 Concrete Formwork 03157 Wood Concrete Formwork 03157.20 Wood Concrete Formwork for Deck 03157.30 Wood Concrete Formwork for Abutment DR. Nabil Dmaidi

11. Distribution Code 9708B 05 03157.203 1. Total 2. Material 3. Labor 4. Equipment 5. Sub-Contract DR. Nabil Dmaidi

12. 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, are 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. DR. Nabil Dmaidi

13. COST ACCOUNTINGREPORTS • Cost report intervals are a function of the project size, nature of the work, and type of contract involved. • There must be a balance between the cost of generating the reports and the value of the management information received DR. Nabil Dmaidi

14. COST CODES • 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. DR. Nabil Dmaidi

15. Most contractors match their cost control system to their payroll periods and to their time-monitoring system. DR. Nabil Dmaidi

16. COST CODES (cont.) • Masterformat • Has 16 divisions • Divisions were developed according to trades • Uniformat • Has 12 divisions • Tends to follow the progress of construction DR. Nabil Dmaidi

17. Relationship Between UNIFORMAT & MASTEFORMAT DR. Nabil Dmaidi

18. UNIFORMAT Level A and B DR. Nabil Dmaidi