Results
- 0
- Hours of downtime
- 11 to 3 days
- Month-end close
- 99.2%
- Inventory accuracy
Across eleven months
Up from 87%
The challenge
The legacy system ran on unsupported hardware, and finance, inventory and HR each kept their own shadow spreadsheets because the reports could not be trusted.
How we approached it
Strangler-fig migration
Modules moved one at a time behind a routing layer, so the legacy system stayed authoritative until each replacement proved itself.
Reconciled before cutover
Every module ran in parallel against live data until the two systems agreed to the cent for a full close cycle.
Trained the shadow-spreadsheet owners first
The people maintaining workarounds became the pilot users, which turned the biggest source of resistance into the adoption channel.
The outcome
Month-end close went from eleven days to three. Inventory accuracy reached 99.2% once the shadow spreadsheets had nothing left to correct.
