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. A single project is a long chain of small records. Developers and agents handle enquiries, site visits, holds, bookings and instalments. Contractors and consultants handle drawings, indents, measurements and bills, with a site that changes every week. Landlords and park owners handle leases, rent and upkeep, month after month, for every tenant who moves in.

The shared object is the unit, the plot, the shed or the floor, which can be free, held, sold or let. Two people must never offer it at once. Money follows in stages, whether as slab demands, stage fees, running bills, rent escalations or common area charges, and each stage is billed only when somebody remembers that it has fallen due.

Papers and partners add to the load. Channel partners and brokers claim the same buyer, contractors send measurements, and consultants return drawings late. Revisions, approvals and agreements sit in separate files. The work needs one project record. Sales, site, design and accounts should all read from it, instead of asking each other for the latest copy by phone.