Migrating Monolithic Legacy ERPs to Cloud-Native Event Architectures

The Monolithic Legacy Trap

Enterprise manufacturers frequently find themselves trapped on 20-year-old on-premise systems. While these systems run core accounting reliably, they cannot scale to modern mobile interfaces, IoT shop-floor machine telemetry, or automated supplier APIs.

The traditional "Big Bang" cutover—where a company turns off their old ERP on Friday evening and prays everything works Monday morning—has a catastrophic 60% failure rate in manufacturing.

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The Strangler Fig Architecture Pattern

Rather than a risky sudden replacement, Nabik AI implements the Strangler Fig Pattern: 1. Phase 1: Read-Only Change Data Capture (CDC): Stream transactions from legacy databases into an event queue. 2. Phase 2: Modernize Peripheral Workflows First: Move warehouse bin picking, mobile sales apps, and supplier portals to the cloud platform first while writing back to legacy ledgers. 3. Phase 3: Core General Ledger Cutover: Once operational modules achieve 100% stability, transition financial journal entries to the modern ERP.

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Dual-Run Financial Ledgers & Reconciliation

During the 60-day dual-run period, both legacy and modern ERP systems compute daily ledger balances simultaneously. Automated reconciliation scripts flag any penny discrepancies in VAT, foreign currency adjustments, or depreciation schedules before legacy hardware is retired.