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service.modernization()

Systems Modernisation

operating context

When the system holds but blocks evolution

The system still holds, but every change is a risk and the legacy stack slows down integrations, security and new projects.

01

Fragile legacy

Issue

Applications and interfaces customized over the years: nobody knows all the dependencies anymore and every patch is a gamble.

Solution

We rebuild architecture, dependencies and risks so you actually know what you touch when you act.

02

Downtime not allowed

Issue

Production cannot stop: a big bang is impossible, and standing still is not a sustainable option either.

Solution

We design release waves with temporary coexistence, defined rollback and regression tests.

03

Expertise leaving

Issue

The engineers who knew COBOL, VB6 or legacy SCADA are leaving. The knowledge gap widens every month.

Solution

We transfer know-how into operational documentation and training before it is lost for good.

operating method

How we work: 4 progressive phases in sequence

01

Technical audit

Analysis of system state: architecture, dependencies, technical debt, documentation coverage.

architecturedependenciestechnical debt
02

Migration strategy

Choosing the approach for each component: rehost, refactor, replatform or replace.

rehostrefactorreplatform
03

Incremental migration

Phased execution with rollback plan, regression testing and operational validation.

rollbacktestsvalidation
04

Stabilisation

Post-migration monitoring, performance tuning and team training on new platforms.

monitoringtuningtraining
expected output

How we structure modernization

The value is not only in the target state, but in the path design that lets you reach it without blocking the business.

Application and infrastructure target state with expected service levels, integrations to preserve and components to retire.

tech spec

Technical approach

explorer
architecture/ 2
operations/ 3
audit-legacy.md
// modernization.audit

Legacy stack technical audit

lettura: Applications, databases, integrations, SCADA, PLCs, environments and backups.
evidenza: Out-of-support components, undocumented dependencies and single points of failure.
decisione: Critical inventory with intervention priorities and per-component risk level.
AS/400COBOLSCADAlegacy db
// modernization.strategy

Per-component strategy

lettura: Functional value, maintenance cost, integrations and continuity constraints.
evidenza: Components to preserve, refactor, replace or retire.
decisione: Choice between rehost, refactor, replatform or replacement for each block.
rehostrefactorreplatform
// modernization.strangler

Strangler fig and coexistence

lettura: Interfaces between old and new, parallel data flows and feature routing.
evidenza: Coupling points that block incremental replacement.
decisione: Coexistence layer with gradual cut-over and ready rollback.
stranglercoexistencecut-over
// modernization.regression

Regression tests and validation

lettura: Critical use cases, reference data, test environments and acceptance criteria.
evidenza: Divergent behaviour, regressed performance and misaligned data.
decisione: Go/no-go window with objective evidence for every release.
regressionacceptancevalidation
// modernization.stabilize

Post-migration stabilization

lettura: Application monitoring, operational metrics, user feedback and open tickets.
evidenza: Late regressions, bottlenecks and areas still depending on legacy.
decisione: Tuning plan, training and definitive retirement of legacy components.
monitoringtuningknowledge transfer
architecture/audit-legacy.md Markdown
next_step.initialize

Plan the modernization

We start from the legacy stack audit to reach a sustainable migration plan with no downtime.