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  2. Chemical plant cost indexes - Wikipedia

    en.wikipedia.org/wiki/Chemical_plant_cost_indexes

    A cost index is the ratio of the actual price in a time period compared to that in a selected base period (a defined point in time or the average price in a certain year), multiplied by 100. Raw materials, products and energy prices, labor and construction costs change at different rates, and plant construction cost indexes are actually a ...

  3. Difference engine - Wikipedia

    en.wikipedia.org/wiki/Difference_engine

    A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. It was designed in the 1820s, and was first created by Charles Babbage . The name difference engine is derived from the method of finite differences , a way to interpolate or tabulate functions by using a small set of polynomial co-efficients.

  4. Material selection - Wikipedia

    en.wikipedia.org/wiki/Material_selection

    Material selection is often benefited by the use of material index or performance index relevant to the desired material properties. [2] For example, a thermal blanket must have poor thermal conductivity in order to minimize heat transfer for a given temperature difference. It is essential that a designer should have a thorough knowledge of the ...

  5. Shewhart individuals control chart - Wikipedia

    en.wikipedia.org/wiki/Shewhart_individuals...

    In statistical quality control, the individual/moving-range chart is a type of control chart used to monitor variables data from a business or industrial process for which it is impractical to use rational subgroups. [1] The chart is necessary in the following situations: [2]: 231

  6. Building Cost Information Service - Wikipedia

    en.wikipedia.org/wiki/Building_Cost_Information...

    The BCIS "Standard Form of Cost Analysis" (SFCA) remained an industry staple, largely unchanged, until the late 2000s. In 2012 the "New Rules of Measurement" for cost management throughout the construction process were accompanied by a modernised version of the SFCA. [1] In 2022, the BCIS was spun out of RICS. [2]

  7. Bollard - Wikipedia

    en.wikipedia.org/wiki/Bollard

    Bollards may also be used to enclose car-free zones. Bollards and other street furniture can also be used to control overspill parking onto sidewalks and verges. [11] Bollards can be temporary and portable, such as this traffic control bollard separating the road from the worksite.

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