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Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured.The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light.
Design for verification (DfV) is a set of engineering guidelines to aid designers in ensuring right first time manufacturing and assembly of large-scale components.The guidelines were developed as a tool to inform and direct designers during early stage design phases to trade off estimated measurement uncertainty against tolerance, cost, assembly, measurability and product requirements.
Design for inspection (DFI) is an engineering principle that proposes that inspection methods and measurement instruments used to certify manufacturing conformity, should be considered early in the design of products.
Management: training programs, metrology system, support of people, support of quality management system. These can be plotted in a "fishbone" Ishikawa diagram to help identify potential sources of measurement variation.
Metrology is the science of measurement and its application. [1] Main articles. Metrology; Measurement; Metrology overviews. Dimensional metrology;
In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of real-world objects and events. Established standard objects and events are used as units , and the process of measurement gives a number relating the item under study and the referenced unit of measurement.
The Joint Committee for Guides in Metrology (JCGM) is a committee which created and maintains two metrology guides: Guide to the expression of uncertainty in measurement (GUM) [54] and International vocabulary of metrology – basic and general concepts and associated terms (VIM). [33] The JCGM is a collaboration of eight partner organisations ...
Computer-aided inspection (CAI) is the use of software tools to assess manufactured objects. [1] [2] It is closely related to computer-aided design (CAD) and computer-aided manufacturing (CAM).
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