The business case for SAP S/4HANA can be challenging

Many organisations struggle with the upfront business case to move from SAP ECC6 to S/4HANA. The cost side of the equation is reasonably straightforward, although planning for contingencies requires careful consideration. The risk of not transitioning is clear – in terms of potential future degradation of support – although difficult to quantify financially. The hardest part of the equation is benefits. 

Some organisations have taken an ultra-pragmatic view, thinking about the programme in two distinct phases. The first phase is about safely transitioning to the new platform and comes with significant costs and low benefits expectations. After taking the time to bed in and understand what S/4HANA offers, the second phase is focused on identifying and delivering value to the business from new functionality. This is where the benefits case comes in. This approach is generally only available where executive buy-in to a long-term SAP strategy is in place.  

In this article we share our view of why the business case for S/4HANA is not straightforward and approaches to overcome the challenges. 

Moving from SAP ECC6 to SAP S/4HANA is both an opportunity and a challenge. SAP has announced that it will end mainstream support for ECC6 by 2027 (with potential to extend to 2030), pushing businesses to evaluate the strategic, operational, and financial implications of transitioning to S/4HANA. Building a solid business case for this migration is complex. 

Why Move to SAP S/4HANA?

SAP S/4HANA represents a significant technological leap from ECC6. Built on the high-performance HANA in-memory database, it offers real-time data processing, a simplified data model, and a modern, intuitive user experience through SAP Fiori. The system also enables greater automation, improved analytics, and more agile operations. The challenge is how to translate this potential into tangible business value to justify the investment. 

Considerations for building the Business Case

Value-Driven Justification 

This involves identifying specific business areas that can benefit from the capabilities of S/4HANA, such as:

• Faster decision-making due to real-time analytics.
• Improved operational efficiency through process automation.
• Enhanced user productivity with intuitive interfaces.
• Reduced IT complexity and lower total cost of ownership in the long term. 

By quantifying these benefits – such as savings in working capital, increased revenue through faster time-to-market, or headcount reduction – a ROI can be projected. 

Technical and Strategic Alignment

Companies must also assess their broader IT and business strategy and how S/4HANA aligns. A business case should highlight how migration supports:

• Long-term digital roadmaps.
• Integration with AI, IoT, and machine learning.
• Future scalability and regulatory compliance. 

Risk Mitigation and Compliance

Continuing on ECC6 post-2027/2030 could create compliance, security, and support risks. Including these risks in the business case, particularly if the industry is highly regulated, can shift the discussion from optional upgrade to mandatory transformation.

Cost Modelling

A realistic cost estimate is essential. This includes:

• Licensing and infrastructure costs.
• Implementation partner fees.
• Internal resource allocation.
• Potential downtime or productivity loss during transition.
• Comparative analysis of different deployment options (on-premise, cloud, hybrid) also adds credibility to the financial evaluation. 

Migration Paths

SAP provides several migration options:

• System Conversion (Brownfield): Converts an existing ECC6 system to S/4HANA, preserving existing configurations and data.
• New Implementation (Greenfield): Re-implements the ERP environment from scratch, offering a fresh start.
• Selective Data Transition: A hybrid approach, allowing selective data and process migration.

Each path has distinct implications for complexity, cost, risk, and time-to-value. The business case should evaluate these based on current ERP maturity, data quality, and transformation goals. 

Common Challenges in Justifying the Move

Despite the strategic benefits, many companies struggle to build a compelling business case for S/4HANA migration due to several challenges:

• High Upfront Costs
  Migrating to S/4HANA is expensive. Stakeholders often focus on the short-term cost rather than long-term value, making it harder to gain executive buy-in.

• Unclear ROI
  Some of the value-driven benefits of S/4HANA – like improved agility or user satisfaction – can be intangible or hard to translate into clear KPIs and financial metrics with confidence of realisation.

• Change Management
  Migration impacts processes, people, and systems. Resistance to change, training costs, and the potential disruption of business operations can create internal pushback, undermining support for the initiative. Getting change management right is a critical success factor for the programme and yet this cost line is often challenged in the business case.

• Customization and Legacy Debt
  Many ECC6 environments are heavily customized. These customizations may not be compatible with S/4HANA or may need rework, inflating migration cost and complexity. Cleaning up legacy systems or reengineering processes adds to the challenge.

• Resource Constraints
  Migration projects demand significant internal and external expertise, which may not be readily available. Companies often need to balance the migration effort with other priorities and initiatives, leading to bandwidth issues. 

Strategies for building a solid business case

We’ve seen a number of good approaches to the business case problem:

• Conduct a Readiness Assessment: Evaluate current systems, data quality, and customizations to define the scope and strategy early.
• Adopt a Phased Approach: Instead of a big-bang migration, consider phased rollouts by function or geography.
• Leverage SAP Tools and Incentives: SAP offers tools like the SAP Transformation Navigator and Business Scenario Recommendations to help identify value areas.
• Involve Stakeholders Early: Secure executive sponsorship and align IT and business teams from the start to ensure cohesive planning and execution. 

In conclusion, migrating from SAP ECC6 to SAP S/4HANA is more than a technical upgrade, it is a major business transformation. Building a strong business case is not straightforward. Every business wrestles with this. It requires aligning technology with business goals, quantifying benefits, understanding risks, and planning carefully for execution. The devil is in the detail, especially when it comes to the benefits case. 

If you’re shaping your S/4HANA Transformation programme, midway through or facing a recovery, and would like a sounding board, please get in touch, we’d love to talk.