Why is decomposition technique used in software projects estimation?

Decomposition of project scope generally involves the following activities:

* Gather information on major project deliverables and analyze related tasks

* Start development of work breakdown structure(WBS) at the highest level

* Decompose the upper WBS levels into lower level detailed components

* Identify each work package & WBS components with unique code, and

* Verify if the degree of decomposition of the work is necessary and sufficient

TO FIX MILESTONE FOR EACH PHASE OF DEVELOPMENT AND GET REVIEW OF EACH PHASE

SO THAT WORK IS DIVIDED AND MONITORED FROM TIME TO TIME ,AND ANALYSES THAT PROJECT CAN BE COMPLETED WITH IN PROPOSED TIME

Decomposition technique is used in project management for breakdown the work into smaller unit of of work which is more manageable and easy to carryout.