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A flatness test of a float-glass optical window on top of a λ/10 optical flat. The window measures a flatness of 4–6 λ per inch. The window measures a flatness of 4–6 λ per inch. In optics , a window is an optical element that is transparent to a range of wavelengths , and that has no optical power .
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A measurement system analysis (MSA) is a thorough assessment of a measurement process, and typically includes a specially designed experiment that seeks to identify the components of variation in that measurement process. Just as processes that produce a product may vary, the process of obtaining measurements and data may also have variation ...
Predictive replacement is the replacement of an item that is still functioning properly. [26] Usually it is a tax-benefit based [ citation needed ] replacement policy whereby expensive equipment or batches of individually inexpensive supply items are removed and donated on a predicted/fixed shelf life schedule.
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The simplest algorithm to find a topological sort is frequently used and is known as list scheduling.Conceptually, it repeatedly selects a source of the dependency graph, appends it to the current instruction schedule and removes it from the graph.
The original application by d'Ocagne, the automation of complicated cut and fill calculations for earth removal during the construction of the French national railway system. This was an important proof of concept, because the calculations are non-trivial and the results translated into significant savings of time, effort, and money.