Accreditation for Microbiological Laboratories
Introduction and Scope Microbiological testing includes sterility testing, detection, isolation, enumeration, and identification of microorganisms (viruses, bacteria, fungi, and protozoa)
Width Variation
Precision Width Variation, Traditionally, precision describes the net effect of discrimination, sensitivity and repeatability over the operating range (size, range
Measurement Process Variation
For most measurement processes, the total measurement variation is usually described as a normal distribution. Normal probability is an assumption
Types of Measurement System Variation
It is often assumed that measurements are exact, and frequently the analysis and conclusions are based upon this assumption. An
Measurement Issues
Three fundamental issues must be addressed when evaluating a measurement system: 1) The measurement system must demonstrate adequate sensitivity. First,
Measurement System Implementation Issues (process)
Support of Measurement System Implementation: Who will support the measurement process? Lab technicians, engineers, production, maintenance, outside contracted service?
Measurement System Build Issues (equipment, standard, instrument)
Have the sources of variation identified in the system design been addressed? Design review; verify and validate. Calibration and
Measurement System Design and Development Issues
What is to be measured in Measurement System? What type of characteristic is it? Is it a mechanical property? Is
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