From Legacy to Modern: How We Migrated a 20-Year-Old System in 6 Months

Metric Value Migration Duration 6 months Total Records Migrated 2.3 million System Downtime 12 minutes The client approached us with a Windows Server 2003 system running a custom-built ERP solution written in Visual Basic 6. The database consisted of 187 tables spread across three SQL Server 2000 instances. Daily operations processed approximately 45,000 transactions, with peak loads causing response times exceeding 30 seconds. The system connected to 47 different third-party services through a