**MD file:** `Data Owner.md`  
**Estimated reading time:** 8–10 minutes

# Data Owner

## Definition

A **Data Owner** is the person or business role accountable for a data domain, dataset, or important business definition.

The Data Owner has authority over meaning, acceptable use, access, quality expectations, retention, and important business rules.

## Simple Mental Model

> **The Data Owner decides what the data means and what should happen with it.**

IT may host the system. Data Engineering may build the pipeline. An analyst may build the dashboard. None of them automatically owns the business meaning.

## How It Works

Example:

```text
Employee Data
Business owner: HR
IT: operates systems
Data team: pipelines and reporting
```

Ownership is accountability, not technical administration.

## Example

Marketing and Product disagree on `Active User`.

The data team should not silently choose the definition because it owns Power BI.

A Data Owner should approve the business definition, which can then flow into [[Business Glossary]] and [[Semantic Layer]].

## How It Fits Into the Bigger Picture

```text
[[Data Governance]]
        ↓
[[Data Owner]]
Accountability / decision authority
        ↓
[[Data Steward]]
Day-to-day quality and maintenance
```

## My Company / Real-World Context

Potential ownership could look like:

- Advertising Revenue → Finance / Advertising business leader
- Employee Data → HR
- Content Metadata → Programming / Content
- Streaming Audience KPI → agreed business owner

Your Data Governance team can facilitate and implement without owning every business concept.

## CTO Perspective

A common failure is confusing system ownership with data ownership.

A useful question is:

> **Who has the authority to make the final business decision about this data?**

If nobody can answer, ownership is unclear.

### Questions to Ask

- Who is accountable for this data?
- Who approves its business definition?
- Who approves access?
- Who establishes acceptable quality?
- Is the owner a business role or merely the person who built the system?
- Is ownership documented?

## Meeting Scenario

**Situation:** Marketing and Product ask your data team to decide the definition of Active User.

**Possible response:**

> "Data can quantify the options and explain the consequences, but this is ultimately a business-definition decision. We need an accountable owner who can approve the definition, after which we'll implement it consistently."

## Key Takeaways

- A Data Owner is accountable for business meaning and appropriate management.
- Ownership is not the same as building or hosting the system.
- Business departments should normally own business meaning.
- [[Data Governance]] should make ownership explicit.

## Related Concepts

- [[Data Steward]]
- [[Data Governance]]
- [[Business Glossary]]
- [[Metadata]]
- [[Data Catalog]]
- [[Semantic Layer]]
- [[KPI]]