Master data How a domain runs

Six stages, each with an owner and a tested output.

A domain goes through the same six stages every time: connect the sources, resolve the records, structure them, govern them, serve them and analyse them.

Connectread the sources01whodata engineeroutputobjects showinglive rowsResolvematch and survive02whostewardoutputgolden recordswith across-referenceStructurelevels and trees03whodomain owneroutputversionedstructuresGovernrules and security04whogovernance leadoutputa policy everydoor obeysServeAPIs and grids05whoarchitectoutputconsumers readingone recordAnalysepivots and measures06whoplanner and analystoutputanswers on thegolden rowsA DOMAIN'S LIFE, LEFT TO RIGHTdays one to six, then continuouslyEvery stage keeps its historyso a change at stage 3 is visible at stage 6the stages repeat for every domain · the platform, the rules language and the security model are learned once
The six stages of a domain, with the person accountable and the output each stage produces. The stages repeat per domain; the platform is learned once.
6
stages per domain, each with a test before the next
product
1 day
to the first published golden view on the showcase estate
showcase
1–6
working days of configuration to a production-grade domain
estimate
6
role pages covering who does what
catalogue
The six stages

What happens, who owns it, what comes out

Each stage is testable on its own, which is why the elapsed time is days.

Each capability page lights the stage it belongs to.

StageWhat happensWho owns itOutputHow it is tested
01 · ConnectRegister the sources and their objects with released read interfaces and credentialsERP application owner with the data engineerObjects showing live rows, with each source's own permissions appliedOpen the object and read rows; compare a count with the source
02 · ResolveStandardise, match in pairs, survive field by field, keep the cross-referenceData stewardGolden records with their source keys and provenanceReview the queue by confidence band; sample merges against known cases
03 · StructureBuild the hierarchies and levels, several per entity, with effective datesDomain ownerVersioned structures that validateValidation reports zero orphan leaves in the live version
04 · GovernWrite the rules, set the twelve security layers, confirm the audit trailGovernance leadA policy every door obeysEach rule previews the rows it flags; a masked column is checked in grid, API and SQL
05 · ServePublish the golden view, the lookup, the services and the write-backIT architectConsumers reading one record through one policyA test write per field and system, checked against the acknowledgement
06 · AnalyseBuild the pivots, measures, drill-downs and saved questionsPlanning centre of excellence and analystsAnswers on the golden rows, with drill-down to the sourceReconcile a measure against the source system for one period
The first days

What a first domain looks like from Monday

Times are from the showcase supplier walkthrough and from engagements; they are labelled, and your estate will differ.

09:00
Sources registeredTwo systems connected; supplier objects showing live rows with their own permissions applied.
10:30
Model in placeKeys chosen, attribute groups set with their winning sources, match rules previewing live pairs.
12:00
Match run41,800 records resolved to 9,340 golden suppliers, with bands by confidence.
13:40
Queue reviewed612 pairs in the review band worked in 41 minutes with the steward.
15:10
Rules and securityColumn and row rules saved with previews; bank details masked; rows filtered by region.
15:52
PublishedGolden view live with its lookup answering in 84 ms at the median.
Weeks 2–4
To productionHistory loaded, write-back enabled per field, consumers moved behind the router, side-by-side run until the difference list is empty.

The reason a day is enough for the first view is that each part is tested where it is configured. A source shows its rows the moment it is registered. A match rule shows which live pairs it selects as it is typed. A rule shows the rows it would flag before it is saved. The work that remains is the agreements, and those are the parts worth the business's time.

Weeks two to four are the production steps: loading history so point-in-time reads cover the period before go-live, enabling the write-back field by field with a test write each time, and moving consumers behind a router so they can be switched one at a time. The first-domain page covers the day in detail, and the migration pages cover the same path when an old hub is being replaced.

A second domain is faster, because the platform, the rules language, the security model and the team's habits carry over. The catalogue estimates one to six days of configuration per domain.

Who does what

Six roles, mapped to the stages they own

Each role has its own page with the day it has and the screens it uses.

After go-live

What keeps running, and who watches it

A domain is a service once it is live, and the platform supplies the instruments.

Running activityWhat it involvesWhere it happens
The steward queueNew and changed source records matched, with pairs above the review threshold queued by confidence and value at stakeStewardship
Rule resultsRows flagged by column, row and business rules, worked like any other queue, with the rule version recordedRules at three levels
Hierarchy versionsReorganisations prepared as a version with an effective date, validated, then made live with history re-rolledHierarchies and levels
Reference data releasesCode lists published on a calendar, with crosswalks and the systems that consume themReference data
Write-back healthAcknowledgements per system and per field, with retries and the freshness per sourceIntegration and sync
Audit evidenceChanges and sensitive reads queried from the ledger for internal and external auditAudit trail
Autonomy reviewWhich action types the models may complete alone, reviewed on the record of their accuracyAI-assisted
Questions

Can stages run in parallel?

Stages 03 to 06 overlap in practice: hierarchies are built while the steward works the queue, and the first pivots appear before the write-back is enabled. Stages 01 and 02 are sequential, since matching needs the sources connected.

What does the business have to staff?

One steward per domain for the queue, an owner who settles the agreements, and access to whoever owns the source interfaces. The platform work is configuration by one or two people.

How is progress reported?

By stage output: objects reading, golden records published, structures validated, rules live, consumers moved, measures reconciled. Each has a screen, so a weekly report is a page that is already written.

What happens when a source system changes?

The interface is re-registered and the objects re-read; the keys and rules stay. Where a field moves, the survivorship for that group is repointed, and the change is recorded in the audit trail.

See your first domain built on your data

Bring two systems that hold the same customers, suppliers or materials. In one working day we connect them, run the match on live rows, review the queue with your steward and publish the first golden view with its API.