Data Warehouse Migration RACI: Roles, Decisions, and Cutover Ownership

Start With Decisions, Then Assign Roles

RACI means Responsible, Accountable, Consulted, and Informed. Responsible roles do the work. The Accountable role owns the result and makes the final decision. Consulted roles provide required input. Informed roles receive the outcome. For each decision or deliverable, keep one accountable owner. A row with several accountable parties is a warning that escalation authority has not been settled.

AWS Prescriptive Guidance for large migrations distinguishes a project sponsor, technical lead, migration lead, testing lead, operations lead, application owners, security, and governance roles. Microsoft likewise separates cloud adoption, governance, platform, security, finance, and business decision functions. Your titles may differ, but the responsibilities still exist. If the internal team cannot cover one, assign the gap deliberately instead of hoping a vendor will absorb it informally.

A Practical Data Warehouse Migration RACI

The matrix below is a starting point for a mid-market or enterprise migration. Replace role names with actual people before execution. The Delivery Lead may be internal or external, but it must be one role with authority to coordinate the entire outcome. Business Data Owners remain accountable for meaning and acceptance of the data; that accountability should not be transferred to a technical provider.

Five Ownership Gaps That Delay Cutover

The first gap is metric ownership. Engineers can prove that rows moved, but only a business owner can approve what revenue, active customer, or inventory means in the target. The second is exception ownership: every migration uncovers source defects and obsolete reports, and someone must decide whether to repair, retire, or accept them.

The third is cross-workstream sequencing. Security approval, network access, source freezes, report testing, and user communications depend on one another. The fourth is go/no-go authority. A cutover call with many voices and no final decision owner converts evidence into debate. The fifth is operational acceptance: if the production support team did not help define monitoring, runbooks, and service boundaries, the project has not completed a handoff — it has transferred risk.

• Metric owner missing Technical parity exists, but business definitions remain disputed.
• Exception owner missing Known defects accumulate because nobody can accept, remediate, or retire them.
• Delivery owner missing Each workstream reports green while end-to-end dependencies remain unresolved.
• Go/no-go owner missing The cutover window begins without a final authority or stop condition.
• Operations owner missing The target goes live without an accepted runbook, alert path, or support boundary.

Match the Delivery Model to the Ownership Gap

A short, bounded migration wave may need a Sprint Pod: a delivery lead plus the architecture, engineering, testing, and analysis capacity required to reach one defined acceptance point. A multi-quarter program may need an Embedded Pod that works inside the existing data function and retains context across waves. A broader rebuild of governance, platform operations, and delivery capability may justify a Dedicated Center of Excellence.

Staff augmentation is appropriate when your internal lead already owns scope, sequencing, acceptance, and handoff, and simply needs additional execution capacity. It is a poor substitute for missing end-to-end accountability. The question is not whether an external specialist is talented; it is whether the engagement contract assigns ownership for the outcome that is actually at risk.

What to Ask a Data Warehouse Migration Partner

Evaluate the operating contract, not the slide deck. Ask who is accountable for the integrated plan; how source inventory becomes a wave plan; who defines acceptance thresholds; how defects are triaged; what evidence is produced at every gate; how knowledge moves to internal operations; and what happens when a dependency owned by another team is late.

Request a sample decision log, reconciliation template, cutover runbook, rollback plan, and handoff checklist with client information removed. Those artifacts reveal whether a provider manages delivery or only supplies technical activity. Do not require invented performance guarantees or generic certifications as a substitute for a clear method, named ownership, and verifiable acceptance evidence.

• Scope Which outcomes are owned, which are excluded, and how are changes approved?
• Evidence What proves architecture, security, data parity, performance, and business acceptance?
• Decision rights Who can accept a defect, stop a wave, approve cutover, or trigger rollback?
• Continuity Where do runbooks, lineage, test results, and operating knowledge live?
• Handoff What must the internal team demonstrate before external support steps down?

Use the RACI as a Live Control

A RACI created at kickoff and never revisited becomes decorative. Review it when scope changes, a new wave begins, an owner leaves, or a production incident exposes an unclear boundary. Attach decision records and acceptance evidence to the relevant rows so the matrix remains an operating index, not a presentation artifact.

Before every cutover rehearsal, ask each accountable owner to state the evidence they expect and the decision they will make. If they cannot, the migration is not ready for a production date. This is also the fastest way to find where external support would be useful: the uncovered responsibility is specific, visible, and tied to an outcome.

Primary Guidance Used for This RACI

The role model was checked against AWS Prescriptive Guidance for large-migration roles, AWS guidance on migration team organization, AWS migration governance guidance, and Microsoft's Cloud Adoption Framework team guidance. Adapt the matrix to your regulatory, contractual, platform, and organizational requirements; it is an operating template, not legal or compliance advice.

Frequently Asked Questions

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