Published estimates run from three weeks to twelve months per accounting system, and the work does not carry over from one vendor to the next. Here are the figures, their sources, and the alternative.
A plain definition of ERP, the modules it bundles, named examples by company size, and the signs that you need a full suite or only an API-first finance core.
A cost model for ERP software in 2026, with the pricing models compared, the costs vendors do not quote, and a worked three-year total for a ten-person company under per-user and metered pricing.
The deferred revenue balance explained case by case, with the debits and credits for each event in a subscription's life and the roll-forward that proves the number.