We are a foundation contractor working under an NEC3 Engineering and Construction Subcontract (ECS) main option B (priced contract with bill of quantities). Some of the piling works have been omitted, causing a compensation event to occur. The main contractor has valued this work by simply not measuring the works omitted. We have argued that the omitted works should be valued using the shorter schedule of cost components. Which is the correct method of assessment?
So, you forecast what the defined cost for the omitted works would have been and add your fee. You then deduct the bill of quantities value of the omitted work. If the difference is a positive figure, that is it would have cost you more than is in the bill of quantities, the total of the prices is reduced. If the difference is a negative figure, that is it would have cost you less than is in the bill of quantities, the total of the prices is increased.