Work Breakdown Structure

Work Breakdown Structure (WBS)

This Method use to break a classification for any work that will be held on.

first you have to determine the main part of your work. In example to made a house you have a Civil Work, ME Work, Architecture work, so on....
This is the main part to made a house, then you divide the main part to get the specific work to complete this part. you do it until there no more work you can describe from the work.

Example
Level 1
A Living House

Level 2
A.1 Civil Work
A.2 ME Work
A.3 Architecture Work
A.4 Yard Work
A.5 Finishing Work

Level 3
A.1.1 Sub Structure Work
A.1.2 Structure Work
A.1.3 Wall Work
A.1.4 ....etc

Level 4
A.1.1.1 Foundation Work
A.1.1.1 Retaining Wall Work

.................

You do it until there no more work can be divide.

WBS use to determine the cost post for the project.
for the Estimate there is no problem to made this base on their experience.