Inventory & dependency graph
Batch jobs, stored procedures, and shadow spreadsheets are mapped with owners and failure blast radius—not just table counts.
EvolveBridge Software Consulting
Programming consulting for legacy data migration—schema mapping, cutover planning, and hands-on implementation support when your production systems cannot afford a guess.
Taichung office: +886-4-0000-2213
Myth: you can lift-and-shift a decades-old datastore in a weekend
Mainframe extracts, COBOL copybooks, and ad hoc Access databases do not behave like cloud-native tables. A weekend copy often hides charset drift, nullable key collisions, and batch windows that no longer exist.
We start with read-only discovery: lineage interviews, job schedules, and reconciliation rules that finance already trusts. Migration code is written only after those constraints are written down.
Legacy migration is an engineering engagement, not a checkbox on a license renewal form.
Myth: any ETL tool can infer your business rules
Tools accelerate loads; they do not replace domain knowledge. We document invariants—how a policy number maps to reinsurance tiers, how a warehouse SKU survived three acquisitions—and encode them in tests before rows move.
Engagements are project-based: technical reviews, paired implementation sprints, and targeted support for teams already mid-migration.
Three checkpoints we refuse to skip
Each checkpoint maps to deliverables you can hand to compliance, operations, and the team that inherits the new stack.
Reconciliation design
Parallel runs with tolerances agreed upfront; no “close enough” totals after go-live.
Cutover rehearsal
Rollback paths and communication trees are rehearsed with the same scripts used on the real window.
Migration myths, answered directly
“We will rewrite everything in the new stack anyway.”
Rewrites still need faithful data contracts. We keep canonical definitions stable while interfaces change, so QA can compare old and new behavior with the same fixtures.
“Our vendor’s accelerator handles compliance.”
Accelerators ship connectors; they rarely know your retention policy. We align PDPA handling, field-level masking, and audit trails with what your privacy notice already promises.
“We only need help for the final weekend.”
Weekend-only support without prior context usually means firefighting. We can join late, but the first days are spent reconstructing decisions that should have been logged earlier.
“Offshore teams can own testing.”
They can execute cases we write. We provide deterministic datasets, expected totals, and defect triage rules tied to business sign-off—not generic test templates.
Tell us what is still on the legacy side
Share platform names, approximate row volumes, and your target date. We respond by email with next steps—no automated quotes on this site.