Business outcome
Use this capability when the framework reveals that an existing system, record, interface, or unsupported dependency is blocking the people and processes required to fulfill the customer promise.
Services
Legacy Modernization · 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.
A strong fit when
- Mission-critical business logic embedded in code nobody fully understands anymore
- Supported integration options are limited or undocumented, leaving critical interfaces dependent on fragile access methods
- Single points of failure with no redundancy, no DR, and one retirement away from crisis
- Every new initiative requires a workaround because the core system can't be extended
Why this service exists
Connect the technology decision to the work the manufacturing business must control.
System responsibility
Modernization preserves the required rules, records, interfaces, user workflows, and operating knowledge while systems are stabilized, connected, replaced, or retired in controlled stages.
Ownership and control
The manufacturer must retain the business logic, data history, validation evidence, support knowledge, transition decisions, and ability to change the replacement architecture.
01
The Problem
Critical manufacturing knowledge and workflows are trapped in systems that are difficult to support or change.
Modernization problems begin when a critical system is treated as old technology without first documenting the rules, records, interfaces, users, and operating knowledge the business still depends on.
What leaders see
Aging systems limit change and concentrate risk.
Support is difficult, integrations are fragile, and ordinary improvements depend on a shrinking group of people.
What is actually happening
The business logic is not fully understood.
Important rules, data, reports, workflows, and exceptions live in code, workarounds, and employee memory.
What gets worse
A rushed replacement threatens operating continuity.
The new system reaches testing before the team has proved what must be preserved or how each transition will be validated.
02
What changes
Make the operating responsibility visible and governable.
Legacy applications often contain undocumented product, order, inventory, production, pricing, and customer logic. We recover that knowledge, isolate dependencies, and modernize in.
01
Operating outcome
Modernize the systems manufacturing still depends on.
02
Knowledge and dependencies to preserve
business rules, critical records, interfaces
03
Decision and exception path
What must be preserved, what can change safely, and whether integration, staged replacement, parallel running, or a smaller intervention is the sound path.
04
Ownership and continuity
Modernization needs a verified account of what the current system does, who depends on it, how records move, what cannot fail, and how the business will validate each transition.
03
Architecture
Build the service around the business record and decision.
What must be preserved, what can change safely, and whether integration, staged replacement, parallel running, or a smaller intervention is the sound path.
01Source record
02Governed connection
03Validation
04Business system
05Accountable owner
Knowledge and dependencies to preserve
business rulescritical recordsinterfacesuser workflowssupport and recovery knowledge
04
Engineering scope
What Metrotechs engineers for Legacy System Modernization.
The exact scope follows the approved business objective, source records, dependencies, controls, and delivery sequence.
01
System Assessment & Documentation
Recover and document the business logic, data structures, integrations, dependencies, ownership, and operating scenarios required for a responsible modernization decision.
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 required historical data through mapping, format conversion, cleansing, reconciliation, validation, exception reporting, and accountable acceptance.
Related service05
Parallel Running
Run selected old and new workflows together and reconcile the records and outcomes the business must preserve. Cutover follows approved operating thresholds, not superficial technical parity.
Related service06
Knowledge Transfer
Transfer the architecture, operations, support, recovery, and change knowledge required by the client's ownership model. The goal is a maintainable system, not a new undocumented dependency.
Related service05
Delivery sequence
From operating reality to a solution the business can own.
Discovery
Audit the legacy system -- business logic, data model, integrations, customizations, and tribal knowledge. Identify what must be preserved vs. what can be retired.
Strategy
Define the modernization path -- API wrapping, module-by-module replacement, or full platform migration. Present risk analysis and timeline for each option.
API / Integration Layer
Build the integration bridge between legacy and modern systems so governed records become available to operational analytics and automation.
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.
Decommission
Retire the approved legacy scope only after dependency closure, archival, access, retention, audit, recovery, and operating acceptance criteria are met.
Related services and systems
Continue through the connected operating environment.
Use these connected services and references to understand the records, workflows, and systems surrounding this work.
06
FAQ
Questions to answer before implementation begins.
Clear answers for manufacturing leaders evaluating the work, operating responsibility, and delivery path.
Yes. We can assess IBM i environments including RPG, COBOL, DB2 for i, interfaces, files, jobs, and terminal workflows, then determine whether documentation, supported integration, staged replacement, or migration is justified.