Detailed Engineering Approach from Actual Cost Records
The detailed engineering approach from actual cost records, also called the “detailed cost approach” or “direct cost method”, uses cost information from contemporaneous construction and accounting records. In general, it is the most methodical and accurate approach, relying on solid documentation of the construction costs and minimal cost estimating. Construction documentation, such as construction drawings, specifications, contracts, job reports, change orders, payment requests, and vendor and supplier invoices, are used to determine unit costs.