It exists so disputed price does not stop the work
Change-order negotiation can take weeks of estimates, subcontractor quotes, and markup arguments. Meanwhile a slab is open or an inspector is scheduled. The CCD separates the direction to build from the settlement of money. The owner accepts the risk of paying by the contract’s fallback method if negotiation fails. The contractor accepts the duty to perform and to keep cost records.
Without a CCD, a verbal "just do it, we’ll sort out the cost" is a claim with bad paperwork. With a CCD, the direction, the date, and the scope are written. The fight, if there is one, is about the amount, not about whether the work was ordered.



