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Quality monitoring and maintenance for products employing end user serviceable components

  • US 6,687,634 B2
  • Filed: 06/08/2001
  • Issued: 02/03/2004
  • Est. Priority Date: 06/08/2001
  • Status: Expired due to Term
First Claim
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1. A method for monitoring the performance of an apparatus comprising the steps of:

  • performing initial calibration procedure to produce a first performance metric;

    detecting the presence of a third party user serviceable component by identifying the absence of a predetermined electronic label;

    performing a subsequent calibration procedure to produce a second performance metric;

    comparing said second performance metric with said first performance metric, and outputting a performance factor indicative of a change in performance resulting from the use of said third party user serviceable component.

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