Three versions of the truth
Most contractors run the BOQ the client signed in one file, the purchase orders the site raised in another, and the subcontractor bills in a third. The margin lives in the gap between them, and it is usually invisible until the job is finished.
Construction ERP resolves this by making the project the centre of the data model. Every commitment and every cost posts against a project and, where relevant, a BOQ line.
Control at the point of commitment
The moment that matters is when a site engineer raises an indent, not when the invoice arrives six weeks later. If the system checks the request against remaining budgeted quantity for that BOQ line and flags an overrun immediately, the conversation happens while something can still be done.
Subcontractor billing without the argument
Running account bills are where most site relationships turn adversarial. A partner portal that lets subcontractors submit measurements, with retention, advance recovery and previous-bill carry-forward calculated automatically, turns a multi-day dispute into a short certification.
Finance that reflects reality
WIP, retention receivable and revenue recognition handled in normal posting rather than as month-end journal work. Project profitability available at any point in the job.