Recommended Practice Guide on Data Evaluation Theory and Practice for Materials Properties developed.Data evaluation is the process by which collections of data are assessed with respect to reliability, completeness, and consistency. Based on more than a decade of experience, NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. has developed a Recommended Practice Guide, Data Evaluation Theory and Practice for Materials Properties This is a list of materials properties. A materials property is an intensive, often quantitative property of a material, usually with a unit that may be used as a metric of value to compare the benefits of one material versus another to aid in materials selection. . SP 960-11, to address the growing need for the evaluation of materials property data. The work approaches data evaluation as a scientific discipline that evolves from the formal underpinnings of materials metrology metrology Science of measurement. Measuring a quantity means establishing its ratio to another fixed quantity of the same kind, known as the unit of that kind of quantity. . A theoretical foundation for data evaluation is developed first, and then the application of the basic principles is illustrated by developing a practical operational protocol specifically for materials property data. An extensive collection of examples is used to examine, in succession, the issues of accessibility, reproducibility, consistency, and predictability. Distinctions are made among definitive relations, correlations, derived and semi-empirical relations, heuristic A method of problem solving using exploration and trial and error methods. Heuristic program design provides a framework for solving the problem in contrast with a fixed set of rules (algorithmic) that cannot vary. 1. theories, and value estimates. Subtopics include the use of properties as parameters in models, the interpretation of ad hoc For this purpose. Meaning "to this" in Latin, it refers to dealing with special situations as they occur rather than functions that are repeated on a regular basis. See ad hoc query and ad hoc mode. parameters, and the treatments of procedural properties, response dependent properties, and system dependent data. This guide is the 11th practice guide produced by NIST. More information on the SP 960 series can be found at www.nist.gov/practiceguides. CONTACT: Ronald Munro, (301) 975-6127; ronald.munro@nist.gov. |
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