MEASUREMENT UNCERTAINTY MODELS

For decades, experimenters, engineers and statisticians have developed several types of measurement uncertainty models. This paper explores the origins of some of the most common models, their strengths, their weaknesses and the reasons for using them in particular situations. Mo dels considered include the U.S. Air Force standard model, the America n Society of Mechanical Engineers (ASME) standard models (c. 1985), th e international Standards Organization (ISO) model and the proposed si mplified ASME uncertainty model which is in harmony with the ISO model . (C) 1997 Elsevier Science Ltd.