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Work Breakdown Structure WBS. 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. Work Breakdown Structure Example. Level. Work Breakdown Structure. Level Description.

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work breakdown structure wbs

Work Breakdown StructureWBS

Prof Awad S. Hanna

work breakdown structure wbs2
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
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

Prof Awad S. Hanna

w ork b reakdown s tructure cont
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

Prof Awad S. Hanna

scope of work packages
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
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
Cost Code

Project

Number

Area

Code

Work Type Code

Distribution

Code

  • Cost Code for stripping concrete formwork for bridge deck (Labor).

9708B 05 03157.20 3

Prof Awad S. Hanna

project number
Project Number

9708B05 03157.20 3

  • Eighth project in 1997 (Bridge)

Prof Awad S. Hanna

area code
Area Code

9708B0503157.20 3

  • Geographic location

OR

  • Associate Field Cost to Specific supervisor or Management

Prof Awad S. Hanna

work type code
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

Prof Awad S. Hanna

distribution code
Distribution Code

9708B 05 03157.203

1. Total

2. Material

3. Labor

4. Equipment

5. Sub-Contract

Prof Awad S. Hanna

cost code and cost control
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 ACCOUNTINGREPORTS
  • 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
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.

Prof Awad S. Hanna

slide15
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
COST CODES (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

uniformat level a and b
UNIFORMAT Level A and B

Prof Awad S. Hanna