Three jurisdictions in one week
A sale within Punjab, one into Chandigarh and one into Haryana are three different tax treatments, and a supplier here handles all three routinely. Setting the buyer's state on the party is all that is needed — the bill applies CGST and SGST or IGST correctly with the right state code, and nobody has to remember which buyer is where.
Organised developers and their process
Planned residential and commercial development means builders with an accounts department, purchase orders and staged payment. A referenced invoice, deliveries recorded against the site, and receipts allocated to specific bills rather than a running balance are what keep those accounts readable at any point in a long project.
Rapid expansion along the corridors
Kharar and Zirakpur have grown quickly, which means new sites appearing and supply commitments made ahead of stock arriving. Minimum levels on the fast lines and honest stock figures are what let you commit to a delivery date and keep it — and in a market this competitive, a broken promise moves an account.
Site-wise reading of one builder
A developer working several towers is one party with several sites, and the reconciliation is always about which site received what. Deliveries record the site, so the ledger can be filtered to one project — which is what both their engineer and their accounts department ask for.