Back to blog Case study

How Hearth & Stone cut hygiene violations by 78% in 60 days

RM
Robert Martinez · COO, Hearth & Stone Hospitality
· 28 April 2026 · 12 min read

When we started piloting CheffyIQ at our flagship Federal Hill outlet in February 2026, I was skeptical. We had spent three years investing in chef training, daily checklists, and surprise audits. The results were okay — but never consistent. Sixty days later, the numbers tell a story I didn't expect.

78%fewer hygiene violations
+24%recipe consistency
$184Kmonthly waste savings
22 minfaster shift handover

The starting point: 47 violations a month

In January 2026, our 5 outlets collectively logged 47 hygiene violations through traditional supervision — chefs working without gloves, missing handwash steps, food sitting too long at room temperature. We knew the actual number was higher. Spot checks miss what cameras catch every second.

The problem wasn't training. Our chefs knew the rules. The problem was that nobody could watch every shift in every kitchen at every moment. So lapses crept in — especially during peak hours when supervision was thinnest.

What we tried (and why it didn't work)

Before AI, we'd tried:

The fundamental issue: compliance isn't a one-off effort, it's a continuous one. And humans aren't continuous — they get tired, distracted, busy.

"After two weeks, I stopped thinking of CheffyIQ as a camera system. It was more like having a sous chef in every kitchen, 24/7, who never gets tired."

— Victor, Head Chef, Federal Hill

Week 1: Skepticism (mine and the chefs')

We were honest with our team from day one: we explained that AI cameras were going in, what they would and wouldn't watch, and how violations would be handled (coaching, not punishment). We had two chefs ask to be transferred. Both stayed after the first week once they realized the alerts came as private coaching clips on their phone, not announcements over a loudspeaker.

The biggest unlock for adoption: chefs got their own scores. Suddenly there was a leaderboard, badges, weekly bonuses for the top performer. What started as "monitoring" became "competition."

Week 4: The numbers started to move

By the end of week 4, daily violations had dropped from 12 to 3. The interesting part: the violations weren't disappearing because chefs were avoiding them. The chefs were genuinely getting better. The system was teaching them in real time.

What surprised me most

I expected the obvious wins — gloves, hairnets, handwash. What I didn't expect:

Week 8: The compounding effect

Two months in, the gains keep compounding. Newer chefs ramp up in 2 weeks instead of 8. Our complaint rate on Yelp is down 34%. We're using the saved supervision time on menu R&D — we launched 4 new dishes this quarter, more than the previous 9 months combined.

What's next for us

We're rolling CheffyIQ out to all 18 outlets by end of June. We're piloting the chef mobile app's gamification more aggressively — the "Reward Points" system seems to work better than cash bonuses for our younger chefs.

If you're considering AI for your kitchen, my advice: start with one outlet, focus on adoption (not enforcement) for the first month, and let the chefs see their own scores. The technology works. The harder part is the change-management.

The bottom line

I went in skeptical. 60 days later, I'm a believer. Not because AI is magic — but because continuous, data-driven feedback loops finally make consistency possible at scale. Something the restaurant industry has needed for a very long time.

RM
Robert Martinez
COO, Hearth & Stone Hospitality · 18 outlets across Baltimore & Charleston.
Get in touch →

Related posts

The shift handover problem (and how to solve it in 5 min)

Lunch ends, dinner starts. Here's what should pass between them.

Your FDA audit is in 3 weeks. Here's how to nail it.

A 14-day prep checklist that turns the audit into a non-event.

Want results like this for your kitchen?

Book a 30-min walkthrough with your menu — no commitment.