TOGAF roadmap outlining six phases of SAP S/4HANA implementation over 24 months with tasks and gates

Insight Arc | SAP, Enterprise Architecture & Supply Chain Strategy

TOGAF® Architecture Roadmap for SAP Implementation: A Practical Guide for Enterprise Architects

What Is an Architecture Roadmap in TOGAF®?

For Enterprise Architects involved in SAP implementation projects, an Architecture Roadmap is not merely a higher-level version of a Work Breakdown Structure (WBS). It is a transformation blueprint that defines how an organization moves from its current state—across business processes, data, applications, and technology—to a target architecture.

It clarifies:

  • The sequence of transformation
  • The scope of each step
  • The intermediate states required to reach the target

In TOGAF®, the Architecture Roadmap is a key deliverable created in Phase E. It connects gap analysis, dependencies, work packages, Transition Architectures, and the Implementation and Migration Plan into a coherent transformation path.

Without this structured approach, SAP programs often suffer from issues such as:

  • Having an implementation plan without a clear rationale for sequencing
  • Disconnect between global template design and business transformation

This is where the Enterprise Architect plays a critical role.

Why the Architecture Roadmap Matters in SAP Programs

SAP implementation is not just a system upgrade. It is typically an enterprise-wide transformation involving:

  • Business process standardization
  • Data integration
  • System consolidation
  • Governance redesign

In manufacturing and global enterprises, functions such as sales, procurement, production, inventory, costing, and finance are tightly interconnected. Changing one domain in isolation often creates unintended impacts elsewhere.

TOGAF® Phase E addresses this complexity by:

  • Integrating cross-domain gaps
  • Structuring implementation sequencing
  • Enabling incremental value delivery

The Architecture Roadmap becomes a shared language:

  • For business: what will change and when
  • For IT: what to implement and in what dependency order
  • For executives: when value will be realized

How to Develop an Architecture Roadmap (TOGAF® Approach)

An Architecture Roadmap should not start with a timeline.

Step 1: Define Baseline and Target Architectures

In Phases B–D, define:

  • Business Architecture
  • Data Architecture
  • Application Architecture
  • Technology Architecture

Then identify gaps between baseline and target.

In SAP terms, this includes:

  • Standardization scope of business processes
  • Local requirements to retain
  • Master data to integrate
  • Legacy systems to retire
  • Interfaces to maintain
  • Cloud strategy

Step 2: Consolidate and Analyze (Phase E)

In Phase E:

  • Consolidate gap analysis results
  • Refine cross-domain requirements
  • Align interoperability requirements
  • Assess dependencies
  • Evaluate readiness and risks

Then:

  • Define Implementation and Migration Strategy
  • Identify and group Work Packages
  • Define Transition Architectures if needed
  • Create the initial Architecture Roadmap and Migration Plan

The key requirement:
The roadmap must represent a logical path to achieve the Target Architecture—not just a list of projects.

Key Considerations When Designing the Roadmap

1. Start from Business Value

The roadmap must link transformation steps to business outcomes.

Examples:

  • Improved inventory visibility
  • Faster financial closing
  • Stronger procurement control
  • More accurate costing

Without this, architecture discussions become purely technical.

2. Make Dependencies Explicit

Dependencies are foundational in TOGAF® migration planning.

Common SAP pitfalls:

  • Starting rollout before master data integration
  • Expanding deployment without finalized authorization design
  • Entering production scope without clear MES/PLM integration strategy

These sequencing mistakes often cause rework.

3. Treat Transition Architecture Seriously

TOGAF® emphasizes defining meaningful intermediate states when full transformation cannot be achieved at once.

Examples:

  • S/4HANA implemented for headquarters and key plants only
  • Centralized finance while production remains local

Each Transition Architecture must:

  • Be a stable state
  • Deliver measurable business value

4. Align Work Package Granularity

Work Packages must be comparable in:

  • Scope
  • Deliverables
  • Dependencies
  • Business value

Avoid mixing levels such as:

  • Global template design
  • Authorization design
  • Country rollout

These must be structured consistently for effective portfolio planning.

Example: SAP S/4HANA Global Transformation Roadmap

Consider a manufacturing company with multiple legacy ERP systems across regions aiming to standardize on S/4HANA.

Business Objectives:

  • Global process standardization
  • Inventory reduction
  • Faster financial closing
  • Gradual retirement of legacy systems

Roadmap Structure:

  1. Preparation Phase
  • Define Architecture Vision
  • Establish principles
  • Confirm scope
  1. Business & Data Design
  • Define To-Be processes (Sales, Procurement, Production, Finance, Costing)
  • Identify standard vs. local variations
  • Design master data integration (material, customer, supplier, BOM, routing)
  1. Work Packages
  • Phase 1: Global template design
  • Phase 2: MDG implementation and data cleansing
  • Phase 3: Pilot (HQ + key plant)
  • Phase 4: Wave 1 rollout (major regions)
  • Phase 5: Full rollout and legacy decommissioning

Transition Architecture Examples:

Transition 1:

  • Finance + procurement + inventory in HQ and key plants on S/4HANA
  • Other regions remain on legacy systems
  • Value: improved financial visibility and procurement control

Transition 2:

  • Expand S/4HANA to major regions (sales, procurement, production)
  • Gradually retire legacy systems

The Role of the Enterprise Architect

The Enterprise Architect must ensure the roadmap is:

  • Explainable to business, IT, and executives
  • Continuously maintained and governed

For each Work Package, clarify:

  • What changes
  • What remains
  • Risks involved
  • Impacted KPIs

Additionally, as Fit-to-Standard discussions evolve, exceptions will increase.
The roadmap must serve as a decision-making tool—not a requirement backlog.

Each exception should be evaluated against:

  • Dependencies
  • Sequencing
  • Transition Architectures
  • Long-term maintenance impact

Conclusion

The value of an Architecture Roadmap in SAP implementation is not in presenting a polished timeline. It lies in guiding transformation while maintaining alignment with the Target Architecture.

By consistently linking:

  • Gaps
  • Dependencies
  • Work Packages
  • Transition Architectures
  • Business value

The roadmap becomes a practical asset that enables Enterprise Architects to drive real transformation.

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

Reference Links

TOGAF Official Sites

ADM Phase E / Opportunities and Solutions / Roadmaps

SAP implementation × TOGAF / EA

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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