# Modernise the estate that outgrew itself

> Your roadmap is waiting on systems that got you here and now take a quarter to change. Our senior engineers read what you have, tell you which parts are worth keeping, and move one capability at a time with real traffic, switching off the old path as they go.

Canonical: https://www.techfabric.com/solutions/modernise-the-estate

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## Everything works, and nothing can change

Nothing is on fire, but a system nobody can safely change still costs a quarter every time somebody asks for something.

### A small change takes a quarter

Four systems have to agree on it and nobody is certain what depends on what.

### The integrations are the estate

A decade of acquisitions and point-to-point connections. Most of the expensive failures are integration failures wearing another name.

### The move happened and nothing changed

The workloads run in the cloud now. They run the same way, cost more, and the reasons anybody wanted to move are still on the list.

The estate is not badly built. It was built for a company that was smaller, and nobody has been funded to redesign it since.

## What we install

### Read what exists

Honestly, including telling you which parts are worth keeping. We would rather do that than sell a rewrite you may not need.

### Find the seams

Where a capability can be extracted without the rest noticing. This is most of the skill and it is why the order matters.

### Extract one thing

The first capability moved end to end, with traffic actually shifted, so the pattern is proven rather than designed.

### Durable workflows at the joins

The multi-day, multi-system processes that must never half-complete get rebuilt on durable execution rather than on retries and a nightly job.

### Retire the old path

Each extraction ends with the previous route turned off, because two live paths is how a modernisation becomes permanent.

### Leave the map

The written record of what was decided, so the next extraction does not start by rediscovering the estate.

## The failure mode we design against

The most common estate we are called into has already been through one of these. It moved, it cost more, and the constraints stayed. Sequencing for early value is the whole difference and it is a choice made in week one.

## Questions

### We already migrated to the cloud. Was that wasted?

No, and it is a common starting point. The move solved hosting. What is usually left is the reason anybody wanted to move, and that work is separable from the hosting decision.

### Do you rewrite or refactor?

Extract, mostly. A rewrite is occasionally right and it is almost never the first answer, because the business keeps changing while it happens and two live systems is a worse position than the one you started in.

### How do we justify this internally?

By the first extraction paying for itself. If the sequence does not put value in front of the programme, it will be cancelled in month nine and that is a reasonable thing for a board to do.