The most expensive mistake in enterprise IT, handled in phases

SAP Practice

SAP sits at the centre of finance, supply chain or manufacturing, which is exactly why changing it carries the highest blast radius in enterprise IT. This practice splits the work into two disciplines: rolling out or migrating the core itself, and keeping it correctly connected to everything around it.

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Watch · the 90-second brief

Why SAP work runs in phases, not one cutover

Blast radius, reversibility and the difference between changing the core and connecting it.

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A phased SAP rollout plan under review before go-live.90 secSample frame · video pending

01Locate the pressure

Is the core changing, or just its neighbours?

A close that will not reconcile, a plant that needs go-live, or a migration deadline all point at the core itself. Stale data in a warehouse system or a CRM that never sees an order status points at the connections instead. Pick the symptom your teams live with and the fitting practice surfaces with its reasoning stated plainly, not as a generic recommendation. Where both hurt, the core change is sequenced first, because an interface rebuilt against a moving system fails twice.

SAP Implementation

Module rollout and S/4HANA migration delivered in controlled, reversible phases.

SAP Integration

IDocs, RFCs and API contracts that keep SAP in sync with everything around it.

02Blast radius is the constraint

Every SAP change earns its way to go-live

A failed ERP change stops a close, a shipment or a payroll run, which is why nothing here moves on a single cutover weekend. This delivery system phases every change by plant, legal entity or interface, holding each phase to reconciliation evidence before the next one starts. Reversibility is treated as a requirement, not a fallback plan. A rollback plan gets rehearsed before a cutover, not written after one goes wrong, and finance signs off on every phase before automation touches its numbers.

  1. Map the current SAP landscape

    Modules, customisations and interfaces already in production get documented before any rollout or integration decision gets made against them.

    The core as it runs today

  2. Sequence the change in phases

    Rollout and migration move plant by plant or entity by entity, so a problem in one phase never blocks the whole landscape.

    One plant or entity at a time

  3. Gate every phase on reconciliation

    Financial and operational data are reconciled against the legacy system before a phase is called complete, not after the fact.

    Numbers that reconcile before cutover

  4. Rehearse the fallback

    Every cutover carries a tested rollback path, so a phase that goes wrong can be reversed rather than fought through live.

    A rollback that was tested, not assumed

03Evidence and proof

Cutovers that never needed the rollback.

SAP proof is a phase that closed clean and a rollback plan that stayed untouched. These previews carry that standard while written client approvals are secured.

Explore case studies
A phased S/4HANA migration sequenced across manufacturing plants.
Nexa Foundry · Industrial manufacturing, EU

An S/4HANA migration phased across nine plants without a missed close.

Nexa Foundry needed an S/4HANA migration that could not risk a single manufacturing plant's monthly close. A phased, plant-by-plant cutover kept every close on schedule.

Plants migrated without a missed close
9 of 9
Cutover weekends requiring rollback
Zero
Sample · pending client approval
SAP inventory data reconciled with a warehouse system through an integration.
Tern · Logistics SaaS, EU

Order data reconciled between SAP and a warehouse system nightly.

Tern's SAP core and third-party warehouse system disagreed on inventory daily. An IDoc-based integration brought both systems into agreement automatically.

Manual reconciliation hours per week
Cut to zero
Inventory mismatches reported monthly
Under 1%
Sample · pending client approval
Portrait of an operations director reviewing an SAP cutover plan.

No cutover weekend ever felt like a gamble. Every phase had a tested way back, and we never needed it once.

Mei TanakaDirector of Operations, Tern
Sample · pending client approval

04Choose your first move

Roll out the core, connect it, or both in sequence

SAP work arrives in three shapes: a rollout or migration that needs delivering, an integration that needs building, or both because the core and its connections are changing together. Each begins with a landscape assessment, so the SAP spend gets priced before the SAP budget is spent.

  • Roll out or migrate a module

    A phased delivery plan sequences configuration, testing and cutover by plant or legal entity for a chosen module or S/4HANA move.

    SAP Implementation

  • Connect SAP to other systems

    IDocs, RFCs, BAPIs and API contracts keep SAP and every dependent system reconciled without manual exports.

    SAP Integration

  • Assess a landscape before committing

    A priced scoping engagement maps modules, customisations and interfaces into a sequenced plan the board can weigh.

    Project Scoping

05Straight answers

Asked before an SAP budget is approved.

Not answered here?

Ask us directly Or scope the work first
How is SAP implementation different from SAP integration?

Implementation changes the SAP core itself: modules, configuration and migration. Integration changes what connects to SAP: IDocs, RFCs and APIs to other systems. A rollout can need both, but they are scoped and risk-managed separately.

How long does a full SAP rollout usually run?

A single-module rollout at one plant can land in a few months; a full S/4HANA migration across multiple entities usually runs a year or more, phased by plant or legal entity. The landscape assessment gives a sequenced timeline before commitment.

Can you work alongside our SAP Basis team or existing partner?

Yes. Basis ownership typically stays with your team or incumbent partner, and this practice scopes around whatever they already run rather than duplicating it.

What does SAP work cost?

The landscape assessment is small and fixed, and it produces the number for whatever follows. Implementation and integration pricing then follow the phased scope, with licence and infrastructure costs modelled separately.

Do you handle S/4HANA migrations specifically?

Yes, S/4HANA migration is delivered as a phased implementation, sequenced by plant or legal entity with reconciliation gates and a tested rollback at every cutover.

How do you avoid disrupting finance or supply chain operations?

By phasing the change instead of a single cutover. Each phase reconciles against the legacy system before the next begins, and every cutover carries a rehearsed fallback rather than a hope that nothing breaks.

What happens to our custom ABAP code during an upgrade?

It gets catalogued during the landscape assessment with a keep, retire or rewrite verdict on each object. Customisation debt is what makes SAP upgrades painful, so it gets worked down deliberately rather than carried forward blindly.

Do you support SAP ECC as well as S/4HANA?

Yes, and the landscape assessment decides which one your business actually needs next. Staying on ECC a while longer is sometimes the right call, and a written recommendation says so plainly rather than defaulting to a migration.