After the S/4HANA-Transformation: Realizing the Promised Efficiency Gains

ByDr. habil. Matthias Georg Will,Dr. Benedikt Hirthammer
Time to read: 5 minutesIndustrial goods, Article
// Overview:

For many companies, the introduction of a new ERP system is one of the biggest steps in their digital transformation. While the implementation project is completed with a successful go-live, the business case originally calculated is often only partially realized. The cause usually does not lie with the ERP system itself, as the focus during the transformation is understandably on the technical migration and the stable operation of the new system. The systematic optimization of processes, responsibilities, and control mechanisms is generally not part of what is typically a technical ERP transformation. This is where Horn & Company’s S/4HANA Efficiency Program comes in: Using Process Analytics, we identify the remaining potential following the transformation and support its implementation until the expected effects are realized in the income statement and balance sheet.

Why aren't the expected savings materializing with the go-live?

The ERP transformation is complete, and the new system is running smoothly. A few months later, an initial assessment is often conducted. Management compares the actual results with the assumptions of the original business case. It is not uncommon for this to reveal a significant implementation gap. The expected efficiency gains fail to materialize, process costs do not decrease, personnel expenses do not develop as expected, and the projected improvements in working capital are also not achieved.

Our project experience shows that this is not an isolated case. The cause is usually not the ERP system itself, but rather the focus of the transformation. The technical implementation of the new system took center stage. The business potential resulting from optimized processes, clear lines of responsibility, and consistent management is often overlooked during the transformation. This creates a gap between the planned business case and the actual results achieved.

Why doesn't this implementation gap constitute a failure of the transformation?

ERP transformations are complex projects with their own set of challenges. As part of the transformation, processes are standardized according to ERP logic, data is migrated, and technical functions are transferred to the new system. The focus is on ensuring stable operations and the organization’s ability to function seamlessly throughout the process.

In this context, the comprehensive identification and implementation of opportunities for economic optimization often take a back seat. Once the ERP transformation has been successfully completed, the actual performance transformation begins. The task now is to analyze the new processes using the system data and consistently align them with efficiency goals.

How can the remaining potential be identified?

Using Process Analytics, we combine process, financial, and inventory data to create transparency across the entire end-to-end value chain in the new S/4HANA system. Anomalies can be traced down to individual materials, document line items, organizational units, and process steps. Process Analytics thus acts as an X-ray machine for operational value creation.

The analysis reveals unnecessary manual tasks, avoidable process loops, inappropriate planning parameters, excess inventory, unfavorable payment terms, poor-quality master data, and data inconsistencies. The data reveals the actual causes of inefficiencies and forms the basis for concrete, actionable improvement proposals. This results in a prioritized action plan with clearly quantified economic benefits.

Why isn't a new ERP system enough on its own?

Realizing the identified potential is not purely a technological task. Sustainable efficiency results from the interplay of technology, processes, organization, and management.

This requires clearly defined end-to-end processes as well as well-defined roles and responsibilities. Business and IT need a shared understanding of how value creation should be managed in the future. At the same time, process metrics must be continuously measured and made transparent through modern dashboards. This allows improvements to be permanently embedded in day-to-day operations.

How can the business case be realized following an ERP-transformation?

Identifying potential opportunities is the starting point. Economic value is realized through their consistent implementation. Every initiative requires clear accountability, a binding implementation plan, and data-driven performance monitoring. Progress must be continuously measured, and deviations identified early on. This is the only way to actually realize the planned potential.

Horn & Company guides you through this process from the initial analysis to verifiable results in the income statement and balance sheet. Our goal is to permanently close the gap between the planned business case and the actual results achieved.

Project Example: What Does a Successful Efficiency Program Look Like After an S/4HANA Transformation?

The following real-world example shows how the business case can be realized through data-driven process optimization following a successful ERP transformation.

Increased Efficiency

Working Capital Reduction

Initial Situation:

An international chemical wholesaler had already been using SAP S/4HANA for a year. The ERP transformation was technically complete, and the new system was running smoothly. However, a review of the business case revealed that the expected efficiency gains had only been partially realized. To ensure the smooth operation of its business, the company had even added about 30 percent more staff to its administrative sales and procurement departments after the go-live.

The transformation initially focused on a successful technical implementation. The processes were migrated to the new S/4 standard, even though it did not align with the existing business model. To reflect the business model’s requirements in the processes, numerous additional manual tasks were required both within and outside the ERP system. As a result, the expected efficiency gains went unrealized.

Our Approach

The first step involved analyzing the end-to-end processes based on ERP data to identify the key efficiency drivers along the entire value chain. The findings were then compared with the actual capacities of the individual organizational units. This resulted in a customized action plan for each organizational unit. A one-size-fits-all optimization program based on the “scattergun” approach was deliberately avoided.

Based on this, a coordinated efficiency program was developed to systematically realize the identified potential. The analysis was not the final step, but rather the foundation for the joint implementation of the measures throughout the organization. The program achieved an efficiency increase of approximately 30%. At the same time, working capital was reduced by 40%. This closed a significant portion of the gap between the originally planned business case and the results actually achieved after the go-live.

Close collaboration with the functional departments was crucial to the program’s success. The measures were developed jointly, responsibilities were clearly defined, and implementation was continuously monitored. As a result, the entire organization aligned behind the efficiency program, ensuring the identified improvement opportunities were realized consistently and sustainably.

The entire organization supported the program, thereby laying the groundwork for the subsequent consistent implementation of the identified opportunities. The program’s success was based on close collaboration with the functional departments. Measures were developed jointly, responsibilities were clearly defined, and implementation was continuously monitored.

What does this mean for businesses?

A successful go-live is an important (technological) milestone and marks the beginning of the next phase of development, which has a stronger focus on organizational and P&L aspects. The technical implementation of the ERP system lays the foundation for more efficient processes. Whether the originally planned business case is realized is determined during this period following the transformation.

Companies should therefore view the post-go-live phase as the start of an efficiency program. Using Process Analytics, Horn & Company identifies the remaining potential following the S/4HANA transformation and supports its implementation until the expected effects are realized in the income statement and balance sheet.

Ready to take the next step?

Whether you’re just starting to think about it or have concrete plans — we’ll listen, ask questions, and work with you to develop your ideas further. In a no-obligation initial consultation, we’ll assess where you stand and how we can support you.

Discover Our Expertise in Data-Driven Process & Performance Optimization

Learn more about how data-driven process optimization creates transparency, unlocks efficiency potential, and enables measurable performance improvements.

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