Keep every unit, drawing, stage and lease on one project record that sales, site and accounts share.

These trades sell, build, design or let space. One project is a long chain of small records. Developers and agents handle enquiries, holds and allotment letters, while contractors and consultants handle drawing issues, material requests, measurement books and running bills. The site changes every week, and each change leaves a record somewhere in the project that somebody still has to find, check and bill. Landlords and park owners handle leases, rent escalations and maintenance, month after month, for each tenant who moves in.

The shared object is the flat, the plot, the shed bay or the floor plate, which can be free, held, sold or let. Two people must never offer it at once. Money follows in stages, whether as slab demands, architect stage fees, running account bills, escalation steps or common area charges. Each stage is billed only when somebody remembers that it fell due, and stages slip quietly across a long project where many people touch the same account.

Papers and partners add to the load. Channel partners and brokers claim the same buyer, subcontractors submit measurements, structural consultants return drawings late, and revisions, approvals and sale agreements sit in separate folders. The work needs one project record. Sales, site, design and accounts should all read from it, rather than ringing each other for the newest drawing.