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DRAFT Comprehensive Fire Service Study MEDINA, MINNESOTA <br /> <br />Matrix Consulting Group Page 39 <br />home furnishings made of foam, plastics, or other petroleum -based products have <br />increased the available fuel load for a fire. Additionally, construction techniques and <br />components have increased the efficiency of our homes but has added a new dimension <br />to fire growth. <br /> <br />3 National Response Time Criteria <br /> <br />The expression of response time has changed. In years past , the measurement was <br />expressed as an average of time. This essentially represents how the system or <br />department is performing 50% of the time and is not a true reflection of how a department <br />is performing. With the research that has been performed in develo ping performance <br />standards and practices the use of fractal time has become the best practice in the <br />measurement and presentation of response time components. Fractal response time <br />measures how often (as a percent of calls) a department can perform within each <br />response time component. The National Fire Protection Association (NFPA) and the <br />Center for Public Safety Excellence (CPSE) use the 90th percentile as the standard to <br />meet for benchmark and baseline criteria. Benchmark measurements are described as <br />the industry best practice. Baseline measurements are described as the actual <br />performance of the organization. <br /> <br />Response time to an emergency or call for assistance has been broken down into <br />measurable and non-measurable segments. The response time continuum begins when <br />the state of normalcy changes to a recognizable emergency. The cascade of events that <br />occurs once an emergency starts or is recognized is illustrated in the following chart. <br />Those highlighted points represent hard data or that which is quantitative versus soft data <br />or that which is subjective and unknown. <br />