Eight European enterprises.
One method, fourteen years of calls made.

Greenfield across 4 geos: standardise from day one, or let each geo build first and harmonise later?

1. ✕Harmonise laterRejected

   Every geo will resist it once their model is live. You will pay for the standardisation twice.

2. ✕Single global template, no local varianceRejected

   Fails in Korea inside three months. Tax, identity, and consent law won't yield to a global schema.

3. ✓Single core model with a 15% local variance budget per geoThe call

   Variance has to be argued in writing. Anything inside 15% is a country decision. Anything outside is a global one.

My counsel

Greenfield is the only chance you ever get to set the precedent. Spend it on the model, not on the speed of the first geo.

How do you hit zero data loss when 7 source schemas don't agree on what a 'patient' is?

1. ✕Map at the canonical layerRejected

   What the SI proposed. Looks clean, hides field-level drift, surfaces 18 months later as a regulatory finding.

2. ✕Big-bang cutover with rollbackRejected

   Board-friendly. Rollback on a pharma migration is theatre. The data is already in production by the time you'd pull the trigger.

3. ✓Validation-gated streaming with a dedicated scrub squadThe call

   +2 weeks on the timeline. 4 FTE upstream of ingestion. Zero loss in production.

My counsel

Don't trust tooling to catch field-level drift across 7 schemas. Put humans upstream of Data 360. The migration that follows is uneventful, and that is the point.

Steering says green. The team knows it isn't. Three M&A targets clear DD in six weeks. Who tells the committee?

1. ✕Trust the steering packRejected

   Defensible. Expensive. The regulatory exposure does not care about your RAG status.

2. ✕Full audit, three months, full engagementRejected

   Too slow for the M&A timeline. Too political for the team that asked for the read.

3. ✓Confidential 10-day read on the three highest-exposure targetsThe call

   Re-priced the risk in money: €4M+. The room listens to euros, not to RAG colours.

My counsel

When the team knows the status is wrong and steering won't hear it, the unblock is an outside read priced to fit between board meetings. The deliverable is one page. The signature is mine.