The summary.
INTEGRATION IS THE ENTIRE POINT
One event updating inventory, fulfilment, invoicing and the ledger without re-entry. Anything less is several systems that happen to be sold together.
MASTER DATA QUALITY DETERMINES EVERYTHING
Every transaction references it, and errors propagate throughout. Invest there before anything else — and get the chart of accounts right, because changing it later is disruptive.
BUYING CAPABILITY FOR A SIZE YOU ARE NOT IS ACTIVELY HARMFUL
Configuration becomes complex, users become confused, and the system is used partially — which makes reports wrong and trust disappear.
PARTIAL ADOPTION IS WORSE THAN NO SYSTEM
The old process is gone and the new one is not trusted. Spreadsheets running alongside are the visible symptom.
VERIFY WITHHOLDING TAX, STATUTORY REPORTING AND ELECTRONIC INVOICING BEFORE PURCHASE
Systems built elsewhere frequently do not support them. Ask which local customers use it and request a demonstration with your actual requirements.
REQUIRE VERIFICATION THROUGH A KNOWN CHANNEL BEFORE CHANGING ANY SUPPLIER PAYMENT DETAIL
Diverted payment fraud depends on that gap and succeeds frequently.
