§4 — FIELD NOTES

Thinking aloud.

Essays, field observations, and long-form research from the Marietta practice. We write when we have something to say — which is less often than we are asked.

FIELD NOTE FEB 2026

What a good evals practice looks like inside a 40,000-person bank.

Most teams reach for accuracy metrics first. The teams that ship reliably reach for something harder to define — and we have finally found words for it.

Priya Ramanathan 7 min →
REPORT JAN 2026

The 2026 State of Enterprise AI Delivery — third annual edition.

Surveying 140 programs across 9 industries. The patterns are stable enough to name. The failure modes are new enough to worry about.

Marietta Research PDF · 64pp →
ESSAY NOV 2025

The quiet referendum on the staff augmentation model.

Enterprise buyers are making a choice — perhaps without knowing it — between two fundamentally different theories of what outside help is for.

Kai Ellington 9 min →
FIELD NOTE SEP 2025

Six things we learned re-platforming a 40-year-old claims system.

None of them are what the architecture diagrams suggested. All of them were discovered on a Wednesday at 11pm.

Darius Osei 6 min →
ESSAY JUN 2025

Why the second AI pilot fails when the first one succeeded.

The first pilot worked because three people who deeply understood the problem were in the room. The second pilot failed because they were too busy running the first one.

Priya Ramanathan 11 min →
REPORT JAN 2025

The 2025 State of Enterprise AI Delivery — second annual edition.

The year the language models became table stakes. What happened to the 70% of programs that still didn't ship.

Marietta Research PDF · 58pp →
— Stay current

New writing, when it exists.
Not before.

We send a note when we publish something we believe is worth your time. That is roughly four to six times a year.

Subscribe via email

NO MARKETING. UNSUBSCRIBE ANYTIME.