Abstract

Kirk and Fred discuss the problem of products being returned because the customer claims it failed and yet when tested to verify or identify the failure mode, it seems to be working as it should.

Key Points

Join Kirk and Fred as they discuss

Topics include:

• Why warranty returns that are returned as failed may be actually good parts
• How the priority of time to repair conflicts with isolation of a cause of failure
• Our common experience that stress (shock) can “fix” a failed system

SOR 090 Not Sure Why Customer Says it FailedKirk Gray

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Show Notes

For additional information on another potential cause of No Defect Found (NDF) warranty returns, see the Accendo Reliability Blog post “Why Parametric Variation Can Lead to Failures and HALT Can Help”

To read more about basic and advanced HALT and HASS see Kirk Gray and John Paschkewitz new book “Next Generation HALT and HASS: Robust Design of Electronics and Systems”