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How a Healthcare Data Platform Went From 5 Nines Aspirational to Actual.

A reliability playbook for Heads of SRE turning availability targets into measured outcomes - honest SLOs from the customer's perspective, error budgets that actually change behavior, and the deploy hygiene that kills most of the incidents.

In depth

Your Contract Says Five Nines.

01

Five-nines is 5.26 minutes of downtime per year.

It is a small number. It is also the number written into healthcare contracts that drive renewal and reference revenue.

In shortIt is also the number written into healthcare contra…
02

The aspirational SLO is the failure mode.

The team commits to five-nines because the contract demands it, then measures from inside the platform where the number flatters them, and learns the truth from customer escalations.

In shortlearns the truth from customer escalations
The detail

The Three Disciplines Every Healthcare Reliability Program Needs.

Zone · 01

Honest SLOs

SLOs defined from the customer's perspective. Per critical user journey. Measured from outside the platform on the paths the customer actually uses, so the number on the dashboard is the number the customer feels.

Zone · 02

Error Budgets That Change Behavior

Error budgets are calculated weekly. When the budget is on track, the team ships. When the budget is burning, the team stops shipping and works the burn. The budget is the rule, not the suggestion.

Zone · 03

Deployment Hygiene

Most incidents are deployment-related. Deployment hygiene reduces them - progressive rollout, automated rollback, change windows for the riskiest services, and a kill switch on every new path to production.

By the numbers

The figures that make it a board-level conversation.

99.997%
Measured availability after the program
78%
Reduction in customer reliability escalations
70%
Reduction in deploy-related incidents
Inside the report

What you'll take away.

01

Weeks 1–3 - Honest SLOs

SLOs defined from the customer's perspective. Per critical user journey.

02

Weeks 4–7 - Error budgets that change behavior

Error budgets are calculated weekly. When the budget is on track, the team ships. When the budget burns, the team stops and works the burn.

03

Weeks 8–10 - Deployment hygiene

Most incidents are deployment-related. Deployment hygiene reduces them. Progressive rollout, automated rollback, change windows on the riskiest services.

Questions

Frequently asked.

Why measure SLO from outside the platform?
Will gating deploys slow us down?
How do we test failover without customer impact?
Does five-nines apply to every service?
What happens when an error budget runs out mid-quarter?
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Next step

Measured Reliability Hits and Holds the Contractual Target.

Talk through how this applies to your roadmap with our engineering leads - a working session, not a sales pitch.

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