Tagged validation

2 pieces

• October 5, 2026 · 11 min read

  Model Retirement Is A Regulatory Event

  Hosted model providers retire models on published schedules, and some deployment types upgrade automatically. For software whose behaviour has been validated, a model changing on a vendor's timetable is a change-control event, not maintenance. Version pinning becomes a regulatory requirement, and the deployment type you choose is a compliance decision.

• October 1, 2026 · 7 min read

  Cadence Lock: When Your Heart-Rate Monitor Starts Counting Your Steps

  Optical heart-rate algorithms separate the cardiac signal from motion by picking the dominant periodic component. When step frequency converges on heart rate, which happens routinely in field sports, the algorithm can lock onto cadence and report steps per minute as beats per minute. It is confident, stable and wrong, and nothing on the display indicates it. The validation protocol has to contain the condition where the two frequencies meet.