Here's how to get a complete picture of it in days, not months.
You know you have Z code and you probably know you have a lot of it. What you almost certainly don't know is exactly what it does, which business processes depend on it, whether any of it is still being used, and how much of it S/4HANA already replaces out of the box.
That gap in knowledge isn't a minor inconvenience. It's one of the biggest reasons S/4HANA migrations stall, overrun, and underdeliver.
The good news is, it doesn't have to be this way.
Every SAP landscape tells the same story.
Over years, sometimes decades, your development teams built custom ABAP objects to fill gaps in standard SAP functionality, solve specific business problems, and support processes unique to your organization. Reports, interfaces, User Exits, BADIs, enhancements, batch jobs; thousands of them, in many cases.
Most were never documented properly; some were built by developers who left years ago; others were written to solve a problem that no longer exists, for a process that has since changed beyond recognition. And yet they sit in your system, quietly running, quietly carrying risk.
When your S/4HANA migration starts, that undocumented estate becomes your programme's first major obstacle.
Before a single migration decision can be made, your team needs to understand what's there. That means bringing in senior ABAP consultants to review the code, object by object. It means months of discovery work, at significant cost, producing a static document that's already out of date before the review is finished. And at the end of it, you're still left with the question nobody has confidently answered: is this code worth keeping?
The traditional approach to custom code analysis is slow, expensive, and inconclusive, and with the 2027 ECC deadline closing in, slow and expensive aren't options you have.
SAP's clean core strategy is clear: keep your S/4HANA system free of modifications; build extensions on BTP, connected via standard APIs; minimize your custom code footprint so you can upgrade faster, access new functionality sooner, and take full advantage of S/4HANA's AI capabilities.
It's the right direction, but you can't pursue clean core without first knowing what you're cleaning.
Most organizations approach their S/4HANA migration with an honest but uncomfortable truth sitting in the background: we don't really know what our Z code does.
They know the volume, but they don't know the substance. They can't answer, with evidence, which objects are business-critical, and which are redundant. They can't tell their CFO how much of the migration effort is driven by custom code they could simply retire.
That's not a technical failure; it's a resource and time constraint. Manual code review at scale, covering thousands of objects with the depth and consistency needed to make confident decisions, isn't commercially viable with traditional methods.
Until now.
ABAPBanZAI is an AI agent built specifically to analyze, classify, and document your entire custom ABAP code estate. It connects directly to your SAP system via read-only access, with zero disruption to your live operations, and does in days what a team of senior ABAP consultants would take months to produce.
Here's what it delivers:
Complete classification of every Z object – ABAPBanZAI automatically identifies and categorizes every custom object in your estate: reports, interfaces, user exits, BADIs, enhancements, batch jobs. Every object named, classified, and catalogued in a structured, searchable inventory.
Business process mapping – For every Z object, ABAPBanZAI identifies which business process it primarily supports, which adjacent processes it touches, and where it has no material impact, mapped against standard SAP process frameworks including Order-to-Cash, Procure-to-Pay, Record-to-Report, and more. For the first time, your CIO can answer with confidence: which of your S/4HANA business processes are most exposed by custom code complexity?
Functional specification reconstruction – Lost the original spec? It was never written to begin with? ABAPBanZAI reconstructs it. By analyzing code behavior, data flows, table interactions, and UI patterns, it generates plain-English functional specifications your business analysts can work from, and your architects can make clean core decisions against. On a large S/4HANA programme, this single capability saves weeks of discovery effort.
Clean core analysis, object by object – ABAPBanZAI integrates directly with S4SensAI, Resulting's agentic SAP platform, to evaluate every Z object against the full S/4HANA standard functionality set. The result is a clear, evidence-based verdict for each object:
This is fit-to-standard analysis at a scale that was never commercially viable before AI. What an SI team would sample, ABAPBanZAI completes, across your entire estate.
Technical debt quantification – ABAPBanZAI overlays usage frequency data across your classified code estate so you can see not just what your Z code does, but how often it's actually used.
A living code Wiki – The output isn't a report you file and forget. Every Z object is documented in a structured, searchable, interactive Wiki accessible to your entire programme team. Each entry includes plain-English functional specifications, logic flow diagrams, UI mock-ups, table interactions, and complexity scoring.
The impact of ABAPBanZAI isn't just in the analysis itself, it's in what that analysis unlocks.
Your business case gets sharper – One of the biggest obstacles to a credible S/4HANA business case is the inability to quantify custom code complexity and migration effort. ABAPBanZAI turns that unknown into a structured, evidenced, prioritized asset register. You can show your CFO exactly how much of your estate is redundant, how much needs re-engineering, and where the real migration effort sits, before a single project plan is committed.
Your programme starts faster – Discovery typically consumes months of senior resource time before real migration work can begin. ABAPBanZAI compresses that to days, giving your programme team a foundation to work from immediately.
Your SI conversations get more productive – When you arrive at the table with a complete, classified inventory of your custom code estate, your systems integrator can scope more accurately, price more honestly, and deliver more predictably.
Your clean core strategy becomes real – Not a principle on a slide, but an object-by-object roadmap with evidence behind every decision.
ABAPBanZAI doesn't operate in isolation, it's part of S4SensAI, Resulting's connected suite of agentic AI tools built for S/4HANA transformation.
The agents work together with S4SensAI using ABAPBanZAI's generated documentation to perform fit-to-standard analysis. Dev Dogen, the SAP Development Lead agent, can write BTP code to replace existing Z transactions, Puma handles programme planning, and Basho builds the business case.
This is what agentic SAP delivery looks like in practice. Not individual tools, but a connected AI capability working alongside your team, compressing the time and cost of your programme from day one.
That's the Deshoring model, and your custom code estate is one of the best places to start.
Your Z code isn't going away, but the risk it carries doesn't have to stay hidden.
You can spend months and significant budget on a manual review that's inconclusive before it's finished, or you can connect ABAPBanZAI to your SAP system and have the complete picture in days.
The 2027 deadline isn't getting further away. The organizations that start their migration with a clear view of their custom code estate will move faster, spend less, and make better decisions than those that don't.
See ABAPBanZAI in action or talk to Resulting about what your custom code analysis could look like.