Glass is won at specification and lost at measurement
The decision happens before the enquiry arrives
On any significant facade or interior job, the glass make-up is decided by an architect or a facade consultant long before a glazing contractor asks anyone for a price. Thickness, coating, interlayer and spacer are written into a specification, and from that point the commercial contest is narrow. If your build-up is not in the document, you are quoting to be compared against something you cannot match on paper.
Processors know this and still treat getting specified as an informal relationship activity with no record. Tracking it as its own pipeline — which consultant, which project, what was submitted, what stage the specification is at — makes it reviewable. It also makes losses honest. A job lost because a competitor was specified is a business development gap, and no discount at tender stage will recover it.
Toughened glass cannot be trimmed
The second decisive moment is measurement. Once glass is toughened it cannot be cut, drilled or reworked, so production cannot responsibly start until site-verified cut sizes exist. In practice, orders are confirmed with a delivery date and then sit for weeks while somebody at the site takes the measurements, and the delay lands on the processor's reputation rather than on the contractor who was late.
Holding cut size status per opening, with an age and an owner, changes that conversation. The contractor is chased in the first week, with a specific list of which openings are outstanding, and the delivery promise can be adjusted while it is still a plan rather than a broken commitment.