Case study · Water supply & logistics
Sarfaraz & Co. runs a fleet of water tankers. Orders, deliveries, diesel, repairs, driver payments and customer accounts were tracked separately. We built one web system that follows a delivery from the booking to the money.
The client
Sarfaraz & Co. supplies water by tanker to homes and businesses. A working day is a stream of orders, each needing a vehicle, a driver, a filling stop, a delivery and, eventually, a payment, often on account.
The problem
Each part of that chain was recorded in a different place. It was hard to know which customers owed what, which vehicles were costing more than they earned, and whether the month had actually been profitable once diesel, maintenance and driver advances were counted.
What we built
The people and assets the business runs on, with access by role.
One screen for the day's work: crew, trips and the day's expenses, entered once.
Customer accounts that always balance, with statements and receipts the customer can keep.
What each tanker really costs, and what the month really made.
Engineering & delivery
Money is stored and calculated as exact decimals, never as floating-point numbers. Operational status (delivered or not) is kept separate from payment status (paid or not), because the two move independently. Historical rates are never changed in place, so an old invoice always shows the price that applied at the time.
The system runs on the client's hosting and deploys automatically from Git, gated by a test suite of 42 automated tests. The owner received a handover document covering daily operation, backups and restore.
Get started
Tell us what you're building. We respond within one business day with a clear plan, price, and timeline.