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Use case

Replace the system nobody dares touch

Legacy systems are rarely replaced because of technology. They are replaced when the last person who understands them is close to leaving, or when the business cannot change fast enough.

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Resultaten

No business freeze during migration
Behaviour documented before it is replaced
History migrated with audit intact
Technology you can hire for

Use case

Waar het wordt gebruikt

Key-person risk

One person understands it, and they are retiring.

Change paralysis

Every small request takes months or is refused.

Unsupported platform

Runtime, database or hardware out of support.

Wat we leveren

Behaviour reconstruction
Phased migration architecture
Dual-run reconciliation
Data migration with validation
Cutover rehearsal and rollback

Voor wie dit is

Teams considering a full software rebuild of a system they still depend on daily
Companies where the current platform cannot be extended but cannot be switched off

Wanneer dit niet de juiste keuze is

Systems that only need performance tuning or a new interface layer

Welke problemen dit oplost

Rebuild paralysis

Everyone agrees a rebuild is needed and nobody can accept the risk of stopping the business to do it.

Unknown true scope

Nobody can say what the system actually does any more. Usage analysis usually shrinks the rebuild considerably.

Hoe we het aanpakken

01
Usage-based scope
Logs show which functions are used and by whom. Unused areas are retired rather than rebuilt.
02
Rebuild in slices
Each slice goes live behind the routing layer and is used in production before the next begins.
03
Verified switch-off
The old system is decommissioned only when reconciliation has matched for a full cycle.

Waar projecten misgaan

Feature-for-feature rebuild

Copying everything, including the parts nobody uses, is the most common way to double a rebuild budget.

FAQ

Veelgestelde vragen

Can we do it without downtime?+

In most cases yes, with phasing and dual-run. Full cutovers are planned for a quiet window with rehearsal.

What if the source code is lost?+

It happens. We reconstruct behaviour from the database, logs and daily users.

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