SAP S/4HANA Migration Readiness Assessment: 20 Questions to Ask Before Starting

Moving from SAP ECC to SAP S/4HANA involves more than choosing a migration date. Businesses need to understand their current systems, review existing processes, prepare their data, assess technical requirements, and make sure employees are ready for the change.

Starting without this preparation can lead to unexpected costs, project delays, data problems, and disruption to daily operations. A structured S/4HANA migration assessment helps businesses identify potential risks before committing to a migration approach or implementation budget.

The assessment also helps decision makers understand whether their existing SAP environment is suitable for system conversion, whether a new implementation would be more appropriate, and which improvements should be completed before the project begins.

But how can a business determine whether it is truly ready?

This guide covers 20 essential questions that IT leaders, finance teams, operations managers, and business owners should answer before starting an SAP S/4HANA migration. Use the questions as a practical checklist during your initial planning discussions.

What Is an S/4HANA Migration Readiness Assessment?

An S/4HANA migration readiness assessment is a structured review of an organization's current SAP environment and its ability to move to SAP S/4HANA.

It examines technical compatibility, business processes, custom code, data quality, integrations, infrastructure, security, project resources, and organizational readiness.

The goal is to identify what is already suitable, what requires attention, and what decisions must be made before implementation begins.

A readiness assessment can also help establish a realistic project scope, preliminary budget, resource plan, and migration timeline.

For businesses still using SAP ECC, the assessment is particularly important because the applicable maintenance timeline depends on the exact SAP release and enhancement package. Organizations should confirm their maintenance position and avoid delaying migration planning until support options become more limited.

20 Questions to Ask Before Starting SAP S/4HANA Migration

The following questions are organized into five areas: business strategy, technical readiness, data and integration, project planning, and post migration operations.

Section 1: Business Strategy and Migration Goals

1. Why Does Our Business Need to Move to SAP S/4HANA?

Start by identifying the business reasons for migration.

Is the organization preparing for the end of applicable SAP ECC maintenance? Does it need better reporting, more consistent business processes, improved operational visibility, or a platform that supports future expansion?

A clear reason for migration helps leadership prioritize requirements and evaluate project outcomes.

Write down the main objectives and agree on how success will be measured. These measures might include more reliable reporting, fewer manual processes, improved data consistency, or reduced dependence on unsupported technology.

2. Which Business Problems Should the New System Address?

Migration is an opportunity to examine existing challenges rather than automatically carry them into the new environment.

Ask department heads about recurring problems in finance, procurement, inventory, manufacturing, sales, and reporting.

For example, if finance teams spend too much time reconciling data from separate systems, the project should assess the underlying reporting and process requirements.

Separate essential business needs from optional improvements. This makes it easier to control project scope and budget.

3. Which Migration Approach Is Right for Our Organization?

Businesses generally assess three approaches:

• System conversion: Convert the existing SAP ECC system while retaining suitable configuration and historical data.

• New implementation: Establish a new SAP S/4HANA environment and redesign selected business processes.

• Selective data transition: Move selected data and processes into the target environment according to defined requirements.

The best approach depends on existing customizations, data requirements, business complexity, and the level of process change the organization wants.

Do not select a method based only on its initial estimated cost. Consider future maintenance, data retention, business disruption, and long term operating needs.

4. Which SAP S/4HANA Deployment Model Fits Our Business?

Should the organization consider SAP S/4HANA Cloud Public Edition, SAP S/4HANA Cloud Private Edition, or an on premise deployment?

The answer depends on requirements involving customization, infrastructure management, security, integration, commercial terms, and operational control.

Evaluate each suitable option against actual business needs. Include licensing, hosting, administration, implementation, and ongoing support in the comparison.

5. How Will We Measure Migration Success?

Define measurable outcomes before the project starts.

Possible measures include successful financial reconciliation, accurate inventory records, reliable integrations, completion of critical business tests, and employee readiness.

Assign responsibility for each measure and establish a baseline where possible.

Without agreed success criteria, project teams may focus on completing technical activities without confirming whether the new environment meets business expectations.

Section 2: Technical Readiness

6. Which SAP ECC Version Are We Currently Running?

Record the current SAP ERP release, enhancement package, database, operating system, and relevant infrastructure details.

These details influence maintenance eligibility, conversion requirements, compatibility checks, and the available migration path.

Do not assume that every ECC environment follows the same support timeline. Confirm the exact product version and applicable maintenance arrangements before setting project deadlines.

7. Has Our Existing SAP System Been Technically Assessed?

Review the current system for compatibility issues, outdated components, technical dependencies, and infrastructure constraints.

Tools such as SAP Readiness Check can help identify relevant considerations for an SAP S/4HANA transition.

The results should be reviewed by experienced SAP professionals who can distinguish critical issues from findings that require further investigation.

A technical assessment provides a stronger foundation for estimating project effort and identifying early actions.

8. How Much Custom Code Does Our System Contain?

Custom programs, reports, enhancements, and modifications can increase migration effort when they depend on functions or data structures that have changed.

Create an inventory of custom developments and identify which are essential, which are rarely used, and which can be retired.

Assess the remaining code for compatibility and remediation requirements.

SAP Custom Code Migration tools can help identify potential issues. Business owners and technical teams should then confirm which developments are still needed and how they should be handled.

9. Are Our Third Party Applications and Add Ons Compatible?

Many businesses rely on third party applications for reporting, tax processes, warehouse operations, document management, payroll, or manufacturing.

Check whether each application and add on is supported in the planned SAP S/4HANA environment.

Contact vendors when compatibility information is unclear. Confirm available versions, licensing implications, upgrade requirements, and any changes needed to existing interfaces.

Missing this step can introduce unexpected expenses or block important business processes during implementation.

10. Can Our Infrastructure Support the Target Environment?

Review infrastructure requirements based on the selected deployment model.

For an on premise environment, assess server capacity, storage, network performance, database requirements, backup, and disaster recovery. For cloud deployments, review service responsibilities, connectivity, security, capacity, and contractual requirements.

The objective is to establish whether the planned environment can support expected workloads and recovery needs.

Infrastructure planning should be based on documented requirements rather than assumptions about the current system.

Section 3: Data and Integration Readiness

11. Is Our Existing Business Data Accurate and Consistent?

Poor data quality can create significant problems during migration.

Check for duplicate customers, incomplete supplier records, inconsistent material information, outdated master data, and inaccurate financial records.

Assign data owners who can review and approve corrections. Establish clear rules for data cleansing and validation before moving information into the target environment.

The earlier these problems are identified, the easier it is to plan the work and estimate the effort required.

12. Which Historical Data Must Be Migrated?

Not every historical record necessarily needs to be transferred into the new system.

Determine which master data, open transactions, balances, documents, and historical records are required for daily operations, reporting, audits, and regulatory compliance.

Some information may need to remain accessible through an archive rather than being migrated into the live environment.

Agree on data retention requirements with finance, legal, compliance, and operational teams. Document the decisions before migration design begins.

13. Have We Documented All SAP Integrations?

Prepare a complete inventory of systems that exchange data with SAP ECC.

This may include customer relationship management platforms, e commerce systems, banking applications, tax software, warehouse management systems, and external reporting tools.

For every integration, document the data exchanged, frequency, business owner, technical method, and operational importance.

The project team can then identify which interfaces require testing, redesign, or replacement.

14. Can We Validate Data After Migration?

Data migration must include verification, not just transfer.

Plan how the business will confirm financial balances, inventory quantities, open transactions, master records, and important reports.

Define reconciliation rules and establish who approves the results.

Trial migrations can help identify mapping problems and data inconsistencies before the final cutover. These tests should be repeated as needed until the results meet agreed acceptance criteria.

Section 4: Budget, People, and Project Planning

15. Have We Prepared a Realistic Migration Budget?

The budget should cover the full project rather than implementation fees alone.

Consider software licensing or subscriptions, consulting, custom code remediation, data migration, infrastructure, integration changes, testing, training, project management, and post go live support.

Also include contingency funds for unexpected technical findings or approved changes in scope.

Compare the estimated investment with the cost of maintaining the existing environment and the expected long term business benefits.

16. Do We Have the Right Internal and External Resources?

SAP migration requires coordination between technical specialists and business teams.

Identify the people responsible for finance, procurement, inventory, manufacturing, security, data, testing, and project decisions.

Confirm their availability and establish who will approve key deliverables.

Where internal skills are limited, determine which capabilities must be provided by an implementation partner or external specialist.

Resource planning helps prevent delays caused by unavailable decision makers or competing business priorities.

17. Is Our Project Timeline Realistic?

A migration timeline should reflect the complexity of the system, the selected approach, data preparation, integration requirements, testing, and employee training.

Avoid setting a deadline before completing the initial assessment.

Build a schedule with defined milestones, dependencies, decision points, and approval periods. Include time for resolving issues found during testing.

The timeline should also account for important financial closing periods, seasonal demand, production schedules, and other business critical activities.

18. Are Employees Ready for the Change?

SAP S/4HANA migration may change screens, workflows, approvals, reports, and job responsibilities.

Identify which employee groups will be affected and determine what training they will need.

Involve key users early in process reviews and testing. Their feedback can reveal practical problems that technical teams may not identify on their own.

Prepare role based training materials, communication plans, and support arrangements for the transition period.

Section 5: Testing, Security, and Future Operations

19. Do We Have a Complete Testing and Cutover Plan?

The project should include functional testing, integration testing, data reconciliation, user acceptance testing, security checks, and performance testing where required.

Test complete business scenarios rather than individual transactions in isolation.

For example, a sales process may involve order creation, inventory availability, delivery, invoicing, and accounting. All relevant steps should work correctly in the target environment.

Prepare a cutover plan that defines responsibilities, timing, communication, validation steps, and recovery arrangements. Critical issues should be resolved before production go live.

20. How Will We Manage the System After Go Live?

Migration planning should include the period after the new system becomes operational.

Determine who will monitor system performance, manage user access, resolve incidents, support employees, and maintain integrations.

Agree on escalation procedures and define how urgent issues will be handled.

The organization should also establish ongoing security reviews, backup and recovery procedures, and performance monitoring appropriate to its deployment model.

A clear operating plan helps the business move from implementation to stable daily operations.

How to Use These 20 Questions in a Readiness Workshop

The checklist is most useful when answered by the people who understand the current business and technology environment.

Organize a workshop involving IT, finance, operations, security, and business leadership. Assign an owner to each question and record the evidence supporting each answer.

Use a simple rating system:

• Ready: The requirement has been reviewed and there is evidence that it is addressed.

• Needs attention: A gap exists, but the team has identified the actions required.

• Not assessed: More information or specialist review is needed.

Prioritize issues that could affect migration feasibility, budget, data accuracy, business continuity, or the project schedule.

The outcome should be an action plan with responsible owners, target dates, and decisions that must be completed before implementation begins.

Conclusion: Start Your SAP S/4HANA Migration With Confidence

A successful SAP migration begins with an honest assessment of the current environment. Reviewing technical compatibility, custom code, data quality, integrations, business objectives, budget, and employee readiness helps organizations identify risks before they become expensive project problems.

The 20 questions in this guide provide a practical starting point, but every SAP landscape has its own requirements. A detailed assessment is needed to confirm the most suitable migration approach, estimate the required effort, and prepare a realistic implementation plan.

VC ERP Consulting can help your business assess its existing SAP ECC environment, review migration requirements, identify technical and operational gaps, and plan the move to SAP S/4HANA.

Ready to assess your SAP migration readiness?

Contact VC ERP Consulting to discuss your current system and next steps.

• Website: https://www.vc-erp.com/contact-us.html

• Email: sales@vc-erp.com

• Phone: +91 99789 60138

Start with the right questions today to prepare your business for a well planned SAP S/4HANA transition.