Legacy Modernization · Parallel Running

Prove the new system works before you switch.

The scariest moment in any migration is the cutover. We eliminate that fear by running old and new systems in parallel with automated reconciliation -- you switch over only when the new system has proven it produces the same results as the old one.

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The Problem

Cutovers Based on Trust Instead of Proof

Go-live decisions based on testing scenarios that don\'t cover real-world complexity
No way to verify that the new system produces the same financial results as the old one
Edge cases and exceptions that testing missed surface in the first week of production
Once the legacy system is turned off, there\'s no going back -- even if the new system has issues
What We Deliver

Service Scope

01
Dual Processing

Both systems process the same transactions simultaneously. Orders, invoices, inventory movements, and financial postings run through old and new in parallel.

02
Automated Reconciliation

Automated comparison of outputs -- order totals, inventory balances, financial summaries, and report data. Discrepancies flagged immediately for investigation.

03
Exception Reporting

Detailed reports on every discrepancy between old and new systems. Root cause analysis for each exception -- is it a bug, a data issue, or a business rule difference?

04
Cutover Criteria

Predefined, measurable criteria for when to cut over -- reconciliation accuracy threshold, exception count, and processing time. No subjective judgment calls.

05
Gradual Transition

Option to transition user groups or business units incrementally. Start with a pilot group before cutting over the entire organization.

06
Rollback Readiness

Legacy system remains fully operational throughout parallel running. If the new system isn\'t ready, you continue on legacy with no disruption.

How We Work

Engagement Process

01
Parallel Plan

Define which processes run in parallel, how long, and what success looks like. Identify the reconciliation points and acceptable variance thresholds.

02
Reconciliation Setup

Build automated reconciliation scripts that compare outputs between old and new systems. Define exception categories and escalation procedures.

03
Parallel Execution

Run both systems in parallel for the defined period. Monitor reconciliation results daily and investigate exceptions.

04
Exception Resolution

Diagnose and fix discrepancies -- configuration adjustments, data corrections, or code fixes in the new system.

05
Cutover Decision

When reconciliation meets the defined criteria, execute the cutover. Keep legacy in read-only mode for the defined safety period.

Common Questions

Frequently Asked Questions

Work with Metrotechs

Every engagement starts with an assessment.

Not a proposal. Not a sales call. We tell you what we find, not what you want to hear. The Launchpad assessment maps your operation before any software work begins.

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