{"id":2211,"date":"2025-08-22T09:07:09","date_gmt":"2025-08-22T13:07:09","guid":{"rendered":"https:\/\/f2labs.com\/technotes\/?p=2211"},"modified":"2025-08-22T09:07:11","modified_gmt":"2025-08-22T13:07:11","slug":"essential-performance-what-it-is-why-it-matters-and-when-you-can-say-no-thanks","status":"publish","type":"post","link":"https:\/\/f2labs.com\/technotes\/2025\/08\/22\/essential-performance-what-it-is-why-it-matters-and-when-you-can-say-no-thanks\/","title":{"rendered":"Essential Performance: What It Is, Why It Matters, and When You Can Say \u201cNo Thanks\u201d"},"content":{"rendered":"\n

Let\u2019s talk about Essential Performance<\/a>\u2014the term that sounds like it belongs in a motivational poster but is actually a cornerstone of medical device compliance. If you\u2019ve ever stared at a test plan wondering, \u201cDo I really need to define this?\u201d\u2014this one\u2019s for you.<\/p>\n\n\n\n

What Is Essential Performance, Anyway?<\/strong><\/p>\n\n\n\n

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According to AAMI CR500, Essential Performance is:<\/p>\n\n\n\n

\u201cPerformance of a clinical function, other than related to BASIC SAFETY, where loss or degradation beyond the limits specified by the MANUFACTURER results in an unacceptable RISK.\u201d<\/p>\n\n\n\n

Translation? If your device stops doing something it\u2019s supposed to do\u2014and that failure could hurt someone\u2014it\u2019s probably Essential Performance.<\/p>\n\n\n\n

It\u2019s not about whether the device turns on or doesn\u2019t electrocute anyone (that\u2019s basic safety). It\u2019s about whether it does its job in a way that keeps patients safe.<\/p>\n\n\n\n

How Do You Decide What It Is?<\/strong><\/p>\n\n\n\n

Start with your Indications for Use. If your device is just along for the ride (think: adjunct therapy), you might not need to define Essential Performance<\/a>. But if it\u2019s delivering therapy or doing something critical\u2014buckle up.<\/p>\n\n\n\n

Then, do a risk assessment (hello, ISO 14971). Ask yourself:<\/p>\n\n\n\n

\u2022  What are the clinical functions?<\/p>\n\n\n\n

\u2022  What happens if they fail?<\/p>\n\n\n\n

\u2022  Would that be bad? Like, really bad?<\/p>\n\n\n\n

If the answer is yes, congrats\u2014you\u2019ve got Essential Performance<\/a>.<\/p>\n\n\n\n

Pro tip: Don\u2019t get lazy with vague language. \u201cMonitor alarms\u201d doesn\u2019t cut it if your device doesn\u2019t even have alarms. FDA reviewers are not fans of generic fluff.<\/p>\n\n\n\n

Common Pitfalls to Avoid<\/p>\n\n\n\n

Let\u2019s be honest\u2014this is where things get messy. Here are some classic missteps we\u2019ve seen:<\/p>\n\n\n\n

\u2022  Skipping the risk analysis: You can\u2019t just say \u201cno Essential Performance<\/a>\u201d without backing it up. That\u2019s like skipping the fire drill and hoping for the best.<\/p>\n\n\n\n

\u2022  Using generic criteria: \u201cDevice functions as intended\u201d is not a testable metric. Be specific. Be measurable.<\/p>\n\n\n\n

\u2022  Copy-pasting from other devices: Just because it worked for Device A doesn\u2019t mean it applies to Device B. Context matters.<\/p>\n\n\n\n

\u2022  Assuming therapy = safety: Delivering therapy doesn\u2019t automatically mean you\u2019ve covered Essential Performance<\/a>. You still need to define it.<\/p>\n\n\n\n

\u2022  Ignoring the IFU: Your Indications for Use are the blueprint. If they say \u201cdelivers therapy,\u201d you\u2019re on the hook.<\/p>\n\n\n\n

When You Can Say \u201cNo Essential Performance\u201d<\/strong><\/p>\n\n\n\n

Yes, there are times when it\u2019s okay to say your device doesn\u2019t have Essential Performance<\/a>. But only if:<\/p>\n\n\n\n

\u2022  The IFU clearly shows it\u2019s not delivering therapy.<\/p>\n\n\n\n

\u2022  There are no clinical functions that could cause harm if they fail.<\/p>\n\n\n\n

\u2022  You\u2019ve documented this with a proper risk-based rationale.<\/p>\n\n\n\n

No shortcuts. No, \u201cwe just decided not to.\u201d And definitely no \u201cwe copied this from another device.\u201d<\/p>\n\n\n\n

Real-World Examples<\/strong><\/p>\n\n\n\n