12 lessons for S4HANA implementation

CEO running a multi-year, multi-million SAP S/4HANA program? Zimmer Biomet vs Deloitte is your prelude. A $172M lawsuit autopsy. This isn’t gossip. It’s governance. What happened (public record) - Zimmer Biomet sued its SI for $172M (Sept 2025). - After years of assessments, blueprints, and promises, the SAP S/4HANA program went live in July 2024 and collapsed within months. - Outcome: supply chain chaos, finance disruption, -1% revenue, $2B market cap hit. Old leadership out. New CEO and CIO brought in to clean the mess and to bring the lawsuit. The real lessons (systemic, not personal) 1. Phase 0 ≠ Preparation Most SIs run Phase 0 as a sales stage - glossy ROI slides, toolkits, “accelerators.” REAL READINESS is Phase -3 to -1: entitlements, IAM, 5Rs, governance DNA. Skip that, and you’re not building transformation, you’re staging rollout theater. 2. Checklist ≠ Orchestration A “2-day task” becomes 2 months when entitlements, budgets, and IAM aren’t aligned pre-contract. That’s why “minimal customization” always mutates into dozens of change orders. 3. Trust ≠ Governance 25 years of vendor history feels safe. Until it isn’t. Trust without competitive tension is lock-in by another name. That's outsourcing accountability with blind trust. That’s how “strategic partnerships” turn into ransom. In this case, invoices were paid under protest just to prevent AMS and cloud support from being cut off. 4. Clean Core ≠ Clean Architecture Following textbook “stick to standard” misses critical processes in EA design. or worse, shoves them into the wrong platforms (like BTP) just to tick the clean-core box. Without Phase -3 to -1 sequencing or a 5Rs review, you don’t modernize debt, you repackage it. 5. Escalation Always Has Two Decks When a program slips, the SI always brings two decks: one to “recover the project,” one to protect themselves legally. That’s not cynicism. That’s survival mode. The CEO commandments 1. Phase -3 to -1 first. Governance, entitlements, architecture, culture, before signing an SI contract. 2. Clean architecture > clean core. Sequence the fix or you’re redecorating liabilities. 3. KPI-tether every build. If it doesn’t tie to EBIT or risk reduction, don’t build it. This isn’t about one lawsuit. It’s about a system that sets even experienced boards up to fail - selling theater and calling it transformation. ==>> If your program hasn’t seen Phase -3 to -1, it’s not too late, but it’s already behind. #SAP #S4HANA #CEO #CFO #ProgramRescue #EnterpriseArchitecture #Governance #PhaseMinus3 #5Rs

𝗪𝗵𝘆 𝗱𝗼 𝘀𝗼 𝗺𝗮𝗻𝘆 𝗘𝗥𝗣 𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 𝗳𝗮𝗶𝗹? 𝗕𝗲𝗰𝗮𝘂𝘀𝗲 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 𝘁𝗿𝗲𝗮𝘁 𝗶𝘁 𝗹𝗶𝗸𝗲 𝗮 𝘀𝗶𝗺𝗽𝗹𝗲 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗽𝗮𝘁𝗰𝗵, not the business transformation it truly is. Listening to my network, there seems to be a rush to complete ERP migrations, as fast as possible, with SAP S/4HANA plans driving most of it. But an ERP system is more than just an IT upgrade. It’s a chance to redesign how your business operates and build a solution architecture that supports agility and innovation. While necessary, these migrations often become redundant without proper alignment to business goals. Something, I've seen happen! Here some get rights to consider: ◉ 𝗔𝗹𝗶𝗴𝗻 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗮𝗻𝗱 𝘁𝗲𝗰𝗵 𝗴𝗼𝗮𝗹𝘀 Ensure that IT and business leaders are on the same page. ERP systems serve broader business objectives, such as innovation, improving procurement strategies, and enhancing supplier relationships. ◉ 𝗙𝗼𝗰𝘂𝘀 𝗼𝗻 𝗼𝘂𝘁𝗰𝗼𝗺𝗲𝘀, 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝘁𝗼𝗼𝗹𝘀. Instead of getting caught up in the technology itself, be clear about the business benefits you'd like to achieve. New ERP functionality can be of support to achieve goals like efficiency, cost reduction, and agility. ◉ 𝗦𝗶𝗺𝗽𝗹𝗶𝗳𝘆 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄𝘀 𝗮𝗻𝗱 𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗲𝘀 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 Don't just migrate complex, outdated processes but streamline them end-to-end. Reevaluate processes for efficiency and desired outcomes. ◉ 𝗜𝗻𝘃𝗲𝘀𝘁 𝗶𝗻 𝗰𝗵𝗮𝗻𝗴𝗲 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 - 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗶𝗻 𝘁𝗿𝗮𝗶𝗻𝗶𝗻𝗴 ERP migrations often fail due to poor user adoption. Beyond training, invest in communication & ongoing support showing the value and relevance of the system to users. ◉ 𝗜𝗻𝘃𝗼𝗹𝘃𝗲 𝗰𝗿𝗼𝘀𝘀-𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝗮𝗹 𝘁𝗲𝗮𝗺𝘀 ERP impacts every area of the business, so cross-team collaboration is essential. Involve stakeholders from finance, procurement, IT, and operations ensures the system meets everyone’s needs. ◉ 𝗙𝗼𝗰𝘂𝘀 𝗼𝗻 𝗱𝗮𝘁𝗮 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 - 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗰𝗼𝗺𝗽𝗿𝗼𝗺𝗶𝘀𝗲 An ERP system is only as good as the data it processes. Ensure that data is clean, consistent, and reliable before migration. Dirty or incomplete data is one of the biggest challenges post-go-live. ◉ 𝗣𝗿𝗶𝗼𝗿𝗶𝘁𝗶𝘀𝗲 𝗦𝘆𝘀𝘁𝗲𝗺 𝗳𝗹𝗲𝘅𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗖𝗼𝗺𝗽𝗼𝘀𝗮𝗯𝗶𝗹𝗶𝘁𝘆 Choose an architecture which allows for future-proofing and integration of new features, scalability and integration. Business models evolve, and your ERP must evolve with them." ◉ 𝗦𝗲𝘁 𝗿𝗲𝗮𝗹𝗶𝘀𝘁𝗶𝗰 𝘁𝗶𝗺𝗲𝗹𝗶𝗻𝗲𝘀 - 𝗶𝘁'𝘀 𝗻𝗼𝘁 𝗴𝗼𝗶𝗻𝗴 𝘁𝗼 𝗯𝗲 𝗾𝘂𝗶𝗰𝗸 𝗶𝗳 𝘁𝗿𝗮𝗻𝘀𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝘃𝗲 Don’t rush an implementation. ERP migrations are complex and require time to integrate properly. A phased approach allows for troubleshooting and mitigates a risk for failure. ❓Any other "get rights" i missed and you would add from your experience. #erp #businesstransformation #migration #sap4hana