How does “How Used is worked out” work on the Credit & performance page?

Used is live, never stored: the supplier's outstanding bills in Xero for that company plus the bills BillScan has approved but not yet pushed, read every time the page loads. Available is the limit less that; the share used drives the status. For Used to be right the credit line must be linked to the supplier's golden record, which is how its bills are found — an unlinked line says so, and the banner offers the likely match from the company number, the registered postcode, the credit contact's email domain and the name, with a warning where only one of those agrees. The side panel adds what is on order and on its way, so the forward view is there before the bill is. Where: Credit & performance (/accounts/credit-control).