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Enterprise EHR Upgrade Achieves Zero-Defect Go-Live Through Comprehensive Validation

About the Client

The client was a large regional health system operating approximately 1,200 inpatient beds and supporting millions of patient encounters annually. The organization was preparing for a major Epic EHR upgrade that touched clinical workflows, interoperability interfaces, and downstream systems across hospitals and ambulatory sites. Given the scale of operations, even minor defects posed a risk to patient safety, clinician productivity, and regulatory compliance.

To ensure a flawless transition, the health system partnered with Zymr to execute end-to-end validation across clinical, technical, and operational dimensions.

Key Outcomes

100% Defect-Free Go-Live
Zero Unplanned Downtime at Cutover

Business Challenges

The Epic upgrade impacted 47 critical clinical workflows and thousands of users across departments. The organization needed to validate functional correctness, interoperability, performance, and user readiness within a fixed go-live window. High clinician adoption expectations meant usability issues could not surface post-launch. The testing effort had to scale rapidly, cover FHIR-based integrations, and simulate real-world production loads—all while guaranteeing zero unplanned downtime.

Business Impacts / Key Results Achieved

Zymr enabled the health system to execute a high-risk EHR upgrade with confidence. Comprehensive validation ensured clinical continuity, strong clinician adoption, and operational stability—protecting both patient care and organizational reputation.

  • 100% Defect-Free Go-Live
  • Zero Unplanned Downtime at Cutover
  • 4.9-Star Clinician Satisfaction Rating
  • Stable Operations Across 2.1M Encounters in First 90 Days

No Patient Safety or Workflow Disruptions Reported

Strategy and Solutions

Zymr delivered a comprehensive EHR testing and validation program designed to de-risk go-live at enterprise scale.

  • End-to-End Functional Validation
    Executed 8,500 test cases across inpatient, outpatient, and ancillary workflows.
  • Clinician-Led UAT at Scale
    Coordinated 3,200 clinician UAT sessions to validate real-world usability and workflow accuracy.
  • FHIR Interoperability Testing
    Validated data exchange across clinical systems and downstream integrations.
  • Production Load and Stress Simulation
    Simulated peak encounter volumes to validate system stability under real-world conditions.
  • Defect Triage and Rapid Remediation Support
    Enabled fast resolution cycles ahead of cutover.

Go-Live Readiness Certification
Provided release confidence backed by quantitative test coverage.

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