Methods of estimating,used in the early stages of cost planning,depend on reliablehistorical cost data whereas an analytical approach to estimating is based on applying current prices for resources to a well-developed design.A contractor may use a combination of estimating methods in developing a cost for a design and build project
1.
Preliminary Estimate
Ø ( i ) Single Rate Methods
·
Story
Enclosure Unit Method
Ø ( ii ) Later Stage Estimating (
Multi Rate Methods)
·
Approximate
Estimating
·
Elemental
Estimating
·
Cost
Modeling
2. Engineering Estimate
3. Contractor detail estimate
· · Unit Quantity Method
· · Total Quantity Method
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