Must-Read for SAP S/4HANA PMs in Automotive Tier 1: A Practical Guide to Connecting Strategy and Execution with TOGAF’s Four Abstraction Levels

This article translates TOGAF’s abstract concepts into practical application within an SAP implementation project. While the focus is on automotive Tier 1 suppliers, the insights are broadly applicable across the supplier landscape.

Agenda:

• Why abstraction levels matter in Tier 1 SAP programs
• Understanding TOGAF’s four abstraction levels from a PM perspective
• Contextual: Defining “why” and “how far” in the strategy phase
• Conceptual: Designing business capabilities aligned with OEM demands
• Logical: Assigning roles across S/4HANA, MES, PLM, and surrounding systems
• Physical: Translating architecture into multi-plant reality
• Rollout: Cross-level change control in global deployment
• Key PM practice: Making abstraction levels explicit
• Takeaways: What you can apply starting tomorrow

Why Abstraction Levels Matter in Tier 1 SAP Programs

The business environment for automotive Tier 1 suppliers has changed dramatically. With CASE and Software-Defined Vehicles (SDV), OEM development cycles are shorter, and specification changes are more frequent than ever.

At the same time, OEM requirements—quality, traceability, delivery models such as JIT/JIS—are becoming increasingly fragmented. Suppliers must respond with greater flexibility while maintaining cost competitiveness under rising pressure.

Legacy systems built through years of customization are reaching their limits. Fragmented plant systems and siloed processes can no longer support global standardization or real-time integration. As a result, many Tier 1 suppliers are moving toward next-generation ERP platforms such as SAP S/4HANA.

However, SAP programs often face a structural gap:

• Executives discuss strategy: cost transparency, inventory optimization, global standardization
• Operations focus on execution: transactions, screens, and reports

The project manager must bridge these worlds. Without a shared abstraction level, discussions become misaligned, meetings stall, and deliverables lose consistency.

This is where TOGAF’s four abstraction levels—Contextual, Conceptual, Logical, and Physical—become powerful. Used as a practical framework, they align conversations, stakeholders, and deliverables across the entire program lifecycle.

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TOGAF Abstraction Levels for PMs

Contextual — Why and Scope

Defines which OEMs, products, and regions are in scope and why transformation is needed
Example: Transform European steering components business to improve cost transparency and delivery performance

Conceptual — Business Capabilities

Designs demand planning, S&OP, production, procurement, quality, and traceability
Example: How OEM demand signals are integrated into planning cycles

Logical — System Responsibilities

Defines roles of S/4HANA, MES, PLM, EDI, and other systems
Example: MES handles JIT/JIS sequencing; S/4 manages aggregated execution data

Physical — Real System Landscape

Defines infrastructure, regions, network, and deployment
Example: Mapping global plants to S/4HANA instances

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Strategy Phase (Contextual)

Key Topics:

• Business drivers: cost pressure, SDV impact, inventory imbalance
• Scope: product lines, regions, processes
• KPIs: delivery performance, inventory turns, cost variance

PM Actions:

• Define OEMs, plants, and KPIs in the project charter
• Align on instance strategy (single vs regional)
• Ensure all discussions trace back to Contextual scope

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Requirements Phase (Conceptual)

Key Topics:

• End-to-end processes: demand integration, production, quality, costing
• Capability mapping: program management, mass production, quality, lifecycle costing

PM Actions:

• Structure Fit-to-Standard workshops
• Clearly declare abstraction level (avoid diving into SAP screens)

Deliverables:

• To-Be process flows
• Fit/Gap analysis
• Global standard definitions

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Design Phase (Logical)

Typical Architecture:

• S/4HANA: core ERP (orders, inventory, finance, costing)
• MES: shop floor execution, sequencing
• PLM: BOM and engineering changes
• EDI: OEM integration

PM Focus:

• Clarify system ownership by process and OEM
• Estimate integration complexity and testing effort
• Define non-functional requirements early

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Build & Test Phase (Physical)

Key Topics:

• S/4HANA PCE regional setup
• Environment strategy (DEV, QAS, PRD, sandbox)
• Network, latency, redundancy
• DR/BCP aligned with OEM supply requirements

PM Actions:

• Validate architecture against logical requirements
• Plan plant-specific testing and training early
• Incorporate network and OEM connectivity lead times

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Rollout Phase (Cross-Level Change Control)

Common Challenges:

• Plant-specific kanban and quality processes
• OEM-specific traceability and labeling requirements

PM Approach:

• Classify changes by abstraction level
• Contextual/Conceptual → global governance
• Logical/Physical → local flexibility

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Key Practice for PMs

Make abstraction levels explicit:

• Label meeting agendas by level
• Embed levels into document names
• Align stakeholders on “which level are we discussing?”

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What You Can Do Tomorrow

• Add abstraction levels to meeting agendas
• Map existing deliverables across four levels
• Include abstraction level in change requests

Using abstraction levels is not theoretical—it is a practical tool to align strategy and execution in complex global SAP programs. Start small: one meeting, one document, one improvement.

Please refer to this article for topics related to Enterprise Architecture (EA).
Enterprise Architecture – Insight Arc | SAP, Enterprise Architecture & Supply Chain Strategy

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Reference Links

• Enterprise Architecture Overview (TOGAF, EA)
  https://allthingscloud.net/enterprise-architecture
• Architecture Abstraction – conceptual, logical, physical levels
  http://www.mgarythomas.com/architecture/togaf/abstraction/

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Disclaimer

Parts of this article were developed with reference to generative AI suggestions and were reviewed, refined, and supplemented based on the author’s professional expertise and judgment.

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