ERP Implementation Phases: Step-by-Step Guide and 10 Mistakes to Avoid
Infographic: ERP Implementation Phases: Step-by-Step Guide and 10 Mistakes to Avoid

Last updated: October 2026 Β· 3 min read

Buying ERP software is the easy part. Making it work for your business takes a structured implementation. Most projects follow similar phases, whether they use SAP Activate, Oracle’s methods or Microsoft’s Success by Design.

Infographic: ERP Implementation Phases: Step-by-Step Guide and 10 Mistakes to Avoid
ERP Implementation Phases: Step-by-Step Guide and 10 Mistakes to Avoid – infographic by Tiwaripedia

The phases at a glance

PhaseWhat happensKey outputs
1. Discover and prepareBusiness case, scope, team, partner selectionProject charter, plan
2. Explore / designFit-to-standard workshops, gap analysisSolution design, backlog
3. Realise / buildConfiguration, development, integrationsConfigured system
4. TestUnit, integration and user acceptance testing (UAT)Signed-off test results
5. Data migrationCleanse and load master and open dataValidated data
6. Train and change managementEnd-user training, communicationsTrained users
7. Deploy / go-liveCutover, final data load, switch-overLive system
8. Run / hypercareStabilise and supportSupport model, improvements

Fit-to-standard: the modern approach

Instead of copying old processes, teams review the ERP’s built-in best practices and change the business process where sensible. Customisation is kept for genuine competitive advantages. This keeps cloud ERP upgradeable and reduces cost.

10 common mistakes

  1. Unclear scope and too many “nice-to-haves”.
  2. Weak executive sponsorship.
  3. Heavy customisation of standard processes.
  4. Underestimating data cleansing.
  5. Putting part-time business users on the project.
  6. Skipping proper integration testing.
  7. Last-minute training.
  8. Ignoring change management and user fears.
  9. Unrealistic go-live dates.
  10. No plan for post-go-live support.

Tips for success

  • Define measurable goals such as faster closing or lower inventory.
  • Appoint strong process owners from each department.
  • Prototype early and show users real screens.
  • Run at least two mock data migrations.
  • Plan a clear cutover weekend with rollback options.
  • Track adoption after go-live with dashboards.

Frequently asked questions

What is SAP Activate?

SAP’s implementation methodology with phases Discover, Prepare, Explore, Realize, Deploy and Run.

What is UAT in ERP?

User Acceptance Testing: business users test real scenarios to confirm the system meets their needs before go-live.

What is hypercare?

A period of intensive support right after go-live, usually a few weeks, to fix issues quickly.

Keep exploring

Facts are based on widely accepted official, scientific and historical sources at the time of writing. Spotted something that needs updating? Let us know.

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