Variations
A variation is a priced change after the contract is let. It uses the same library and buildup as the original bill.
Open the project → Variations. Create a variation and choose the procurement route (JCT or NEC wording).
Add items and price them through the same pinned library as the estimate. A varied rate must still point to its source.
Statuses run from draft through submitted to agreed. Every change is audited.
Link the architect’s instruction or other evidence on the variation. A number without a paper trail is not enough.
Examples
Extra pad foundation
Create VO-003. Add an excavation item and a concrete item from the same cost database used on the original bill. Submit. When the client agrees, the status becomes agreed and the final account can pick it up.