If a workshop made custom supports, its form could collect intended use, dimensions and sketches. Examples would illustrate the measurements needed. The manufacturer would review the request before proposing material, quantity and timing. Drawing approval would precede production, while the order record would retain accepted changes so staff do not accidentally work from an older version of the design.
An illustrative example to adapt to your business. It does not represent a completed project in this municipality.
Is a professional drawing required?
A readable sketch can be enough to begin a discussion. The website could show a measurement example and explain how the workshop prepares a drawing for the customer's approval.
How would a change after quotation work?
A change request could create a new version for review. The manufacturer would confirm the price and timing effects before replacing the agreement that the customer previously accepted.