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Method of intelligent data analysis to detect abnormal use of utilities in buildings

  • US 6,816,811 B2
  • Filed: 07/20/2001
  • Issued: 11/09/2004
  • Est. Priority Date: 06/21/2001
  • Status: Expired due to Term
First Claim
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1. A method for determining abnormal consumption of a utility by a system:

  • repeatedly measuring a level of use of the utility thereby producing a plurality of utility measurements;

    employing a statistical procedure to identify a set of outliers in the plurality of utility measurements;

    removing the set of outliers from the plurality of utility measurements to define a set of non-outliers; and

    evaluating performance of the system in response to the set of outliers and the set of non-outliers by determining a severity of abnormal utility usage represented by each outlier in the set of outliers, wherein determining a severity of abnormal utility usage for each outlier comprises calculating how far each outlier is from a robust estimate value for utility usage determined from the set of non-outliers.

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