ERP Development for Petrozen Group

Petrozen Erp

Petrozen ERP was built for Petrozem group of oil & gass Fuel Trading companies, moving off Excel and manual bookkeeping. The team needed a system where every sale automatically posts to the correct ledger, without users needing formal accounting training.

What was actually broken

Businesses were losing money to manual posting errors, unclear customer balances, and reports that took an accountant days to trust.

Evidence before opinion

Users trusted a system only when every number could be traced back to a source transaction.

The real friction was not data entry, it was fear of an unrecoverable posting mistake.

Sales staff and accountants needed the same data but completely different vocabulary and views.

Where AI breaks expectations

I mapped where users expected a single "save" action to quietly do the work of a full accountant - invoice, tax split, ledger post, balance update and designed the system to make that automation visible, not invisible.

Directions considered, choices made

Wire Frames

High Fadility Designs

Chart of Account Heatmap

Results