Enterprises transitioning to SAP S/4HANA face a critical bottleneck: the retention of redundant custom code that prevents the adoption of agentic AI features. According to Business Process Xperts (BPX), organizations that fail to standardize business processes before migration risk carrying legacy technical debt into a system designed for modern automation. By leveraging tools like SAP LeanIX, Signavio, and WalkMe, firms can prune inactive code and streamline process estates, effectively preparing their digital core for the post-2027 AI roadmap.
Why Is the “Clean Core” Essential for AI?
A clean core is not merely a maintenance chore; it is a prerequisite for utilizing the advanced AI capabilities SAP plans to roll out after 2027. Nikhil Agarwal, COO of Business Process Xperts, warns that migrating a “messy” system forces companies to pay the high costs of a new platform without gaining the agility the system promises. Industry estimates indicate that 40% to 60% of custom code in existing SAP systems is inactive but remains maintained, consuming resources and complicating upgrades.
BPX engagements have helped organizations achieve up to $8.1 million in annual cost avoidance by identifying and retiring obsolete custom objects, effectively creating the budget required to fund a modern, AI-ready architecture.
How Can Organizations Reduce Migration Complexity?
Standardization serves as the primary defense against the technical complexity that causes most migration projects to stall. Data from BPX shows that a German specialty chemicals manufacturer successfully rationalized its fragmented estate into 175 standardized end-to-end processes. Similarly, a Nigerian oil and gas operator reduced its redundant process versions by 33% using Signavio-led standardization. Organizations that fail to address these inefficiencies often struggle with testing; research indicates that 59% of firms rank the testing of custom code as their most significant migration hurdle.
What Happens When Custom Code Goes Unchecked?
The expiration of mainstream support for SAP ECC on December 31, 2027, creates a narrow window for transition. Thousands of companies are currently competing for a limited pool of SAP talent to manage their S/4HANA conversions. Those who choose to lift and shift their existing customizations intact essentially migrate the inefficiencies of the old system into the new core. This prevents the system from absorbing SAP’s native AI and automation features, forcing companies to undertake expensive rework later to achieve the functionality they originally sought.
Pro Tip: Assessing Your Custom Objects
BPX utilizes a four-level code triage system (Levels A through D) to score custom objects. By prioritizing the retirement of Level D extensions, technical teams can ensure the stability of the S/4HANA upgrade while keeping critical business functions intact.
Frequently Asked Questions
- What is a “Clean Core” in SAP?
A clean core refers to an SAP environment that minimizes custom code extensions and relies on standardized, end-to-end business processes, making it compatible with future AI and cloud updates. - Why is the 2027 deadline significant?
Mainstream support for SAP ECC ends on December 31, 2027. After this date, SAP will no longer provide security patches or legal updates for the legacy core. - How does process mining improve migration?
Tools like Signavio allow organizations to use event-log evidence to see which processes are actually used, replacing subjective opinions with data-driven decisions on what to keep or discard.
Is your organization prepared for the S/4HANA transition? Explore the BPX Clean Core Playbook to learn how to streamline your processes and avoid the hidden costs of legacy migration.
