Any one worth one's salt evaluates their estimates vs actual costs, by numerous line items, each broken down by equipment, labor,materials, fringe benefits, and other miscellaneous (small) expenditures, AND THEN AN EVAILUATION OF PRIOR STATEMENTS/PROJECTIONS FOLLOWS-MONTHLY(at the minimum). This must happen on a montly basis, to survive, and the resultant assessment conveyed to all(Owner, client, investors, and, most importantantly, the outcome measures shared with the workforce who compiles the data). Lest, one likely flounders. With out input, your left with nothing.
Checks and balances.