Estimating

Estimating

Estimating

Since our founding in 1988 we have prepared close to one thousand estimates for a wide variety of industries around the world. Our Estimating Capabilities cover the full project lifecycle, including CAPEX, OPEX and DECOMEX.

We would normally categorise cost estimates into four levels, depending on the scope of the engineering definition of the project and the estimating techniques used – This will define the estimate accuracy that can be achieved.

Our estimating methods also align with AACE estimating classes. The alignment below shows the typical stages at which each type of estimate would be applicable – As project definition matures the time taken to process the project deliverables increases increasing the time taken to prepare an estimate.

PCP Est. Level
AACE Est. Class
Project Stage
Estimating Methodology
Anticipated Accuracy
Level 1
Class 5
Pre-Feasibility Study
Capacity / Parametric Estimating
+ 40% / -25%
Level 2
Class 4
Feasibility Study / Concept Selection
Factored Estimating
+ 25% / -15%
Level 3
Class 3
Conceptual Design / EPC Contract Award
Estimating using composite norms
+ 15% / -10%
Level 4
Class 2
Detailed Design
Detailed estimating
+ 10% / -5%
Class 1
Bid/Tender
Contract Analysis / Claim resolution