NCJ Number
14970
Date Published
1973
Length
32 pages
Annotation
THE REQUIREMENTS THAT NEED TO BE MET TO REDUCE THE NUMBER OF FALSE ALARMS TO AN ACCEPTABLE LEVEL AS MORE SYSTEMS ARE INSTALLED.
Abstract
THE REQUIREMENTS RELY ON THE MEAN-TIME-BETWEEN-FALSEALARMS (MTBFA) AS A SYSTEM PARAMETER RELATED TO THE ABILITY OF THE SYSTEM TO FUNCTION FOR LONG PERIODS WITHOUT TRANSMITTING A FALSE ALARM TO THE POLICE. THE SECTION ON APPROACH AND METHODOLOGY OUTLINES THE MOTIVATION TO FOCUS EARLY ATTENTION ON BURGLARY IN GENERAL AND BURGLAR ALARMS IN PARTICULAR AND DISCUSSES THE DECISION TO RESTRICT THE PROBLEM TO FALSE ALARMS. THE RESULTS OF THIS ANALYSIS INDICATE THAT IN ORDER TO BE ACCEPTABLE TO POLICE DEPARTMENTS, THE SYSTEMS NOW BEING DESIGNED SHOULD HAVE AN MTBFA OF ABOUT NINE MONTHS IF THEY ARE FOR NONRESIDENTIAL (BUSINESS) AND ABOUT TWO YEARS IF THEY ARE FOR RESIDENCES. THE GOAL FOR LONG-TERM FUTURE DEVELOPMENTAL EFFORTS SHOULD BE ABOUT TWO YEARS FOR NONRESIDENTIAL ALARMS AND SIX YEARS FOR RESIDENTIAL ALARMS. THIS REQUIREMENT IS FOR A COMPLETE FUNCTIONAL SYSTEM, INCLUDING THE USER OR OPERATOR. FOLLOWING A DISCUSSION OF MTBFA REQUIREMENTS, THE DOCUMENT PRESENTS APPENDIXES CONTAINING BURGLARY STATISTICS, DISCUSSION ON THE CLASSIFICATION OF BURGLAR ALARMS, AND COMMENTS ON THE INTERRELATIONSHIP OF THE PARAMETERS USED IN THE REPORT. REFERENCES ARE INCLUDED. (AUTHOR ABSTRACT MODIFIED)