What leaders see
Packaged tools do not fit the required work.
Teams rely on workarounds because standard products cannot represent a critical workflow, rule, interface, or decision.
Services
Operational Prerequisite · Legacy Modernization
Legacy System Modernization
Modernize the systems manufacturing still depends on. Legacy applications often contain undocumented product, order, inventory, production, pricing, and customer logic. We recover that knowledge, isolate dependencies, and modernize in controlled stages while preserving the operating capabilities that must continue.
01
The Problem
Critical manufacturing knowledge and workflows are trapped in systems that are difficult to support or change.
Custom-software problems begin when the operation has a real capability gap but has not separated what should be configured, integrated, modernized, purchased, or deliberately owned in code.
What is actually happening
The durable requirement is not isolated.
Business rules, legacy dependencies, integration boundaries, user needs, and support ownership remain mixed together.
What gets worse
Every workaround becomes a software dependency.
Uncontrolled customizations accumulate without architecture, testing, documentation, or a maintainable change path.
02
What Changes
What Legacy System Modernization includes.
Legacy applications often contain undocumented product, order, inventory, production, pricing, and customer logic. We recover that knowledge, isolate dependencies, and modernize in controlled stages while preserving the operating capabilities that must continue.
01
System Assessment & Documentation
Reverse-engineer and document your legacy system's business logic, data structures, integrations, and dependencies. Create the knowledge base that probably never existed.
Related service02
API Layer Development
Build a governed API layer over legacy systems so new manufacturing applications can use approved records without requiring core replacement first.
Related service03
Phased Migration Strategy
Replace modules incrementally -- move order management first, then inventory, then financials. Each phase is self-contained with rollback capability.
Related service04
Data Migration & Validation
Migrate decades of historical data with format conversion, cleansing, and validation. No data left behind, no data corrupted in transit.
Related service05
Parallel Running
Run old and new systems in parallel with automated reconciliation. Switch over only when the new system proves it matches the old one's accuracy.
Related service06
Knowledge Transfer
Train your team on the new systems and document everything. The goal is independence, not a new dependency on us.
Related service03
How It Fits Your Operations
How Legacy System Modernization fits your operation.
Custom Software EngineeringWhat gap is worth owning in custom code, what can remain standard, and how the capability will be supported and changed.
Governance dependencyCustom software is warranted only when a documented manufacturing capability cannot be delivered cleanly through existing products, configuration, or a smaller integration.
Capability the operation requires
operating rules
system interfaces
user decisions
exceptions
support and change history
What must be defined before engineering begins
- What the business needs to change and why.
- Which systems, records, risks, and readiness gaps shape the work.
- What should be built, how it fits the architecture, and in what order.
Related Services and Planning
What the operating problem may require next.
Follow the dependencies behind this service instead of treating it as an isolated project.
01
Integration Engineering
Connect the new or modernized capability to the operating environment around it.
Explore next step02
Workflow and Exception Automation
Define the actions, approvals, exceptions, and ownership the software must support.
Explore next step03
Operational Analytics
Make adoption, operating performance, and exceptions measurable after delivery.
Explore next step04
Launchpad assessment and Roadmap
Use Launchpad when the operating problem needs a structured assessment, readiness evidence, architecture, and implementation Roadmap.
Explore next stepStart With the Operating Problem
Define the smallest sound response and delivery sequence.
Metrotechs determines what the operation actually requires before selecting technology. When a structured assessment is warranted, Launchpad turns evidence into priorities, risks, architecture, and an implementation Roadmap.
Metrotechs designs, builds, integrates, and supports the approved solution.
Launchpad is available when the engagement needs assessment evidence, a Roadmap, and ongoing delivery governance.
04
Delivery sequence
How Metrotechs delivers Legacy System Modernization.
Legacy applications often contain undocumented product, order, inventory, production, pricing, and customer logic. We recover that knowledge, isolate dependencies, and modernize.
01
Discovery
Audit the legacy system -- business logic, data model, integrations, customizations, and tribal knowledge. Identify what must be preserved vs. what can be retired.
02
Strategy
Define the modernization path -- API wrapping, module-by-module replacement, or full platform migration. Present risk analysis and timeline for each option.
03
API / Integration Layer
Build the integration bridge between legacy and modern systems so governed records become available to operational analytics and automation.
04
Phased Replacement
Replace legacy modules one at a time with parallel running and validation gates. Each phase is a complete, tested unit before the next begins.
05
Decommission
Retire the legacy system with data archival, compliance documentation, and final validation. Clean cutover with no orphaned dependencies.
05
FAQ
Questions that usually decide the scope.
Straight answers to what operators ask before committing budget to this work.
Yes. We have extensive experience with AS/400 (IBM i) including RPG, COBOL, DB2/400, and green-screen applications. We can build API layers, extract data, and plan phased migrations off the platform.