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What is Measurement?

Updated: Apr 3


The process of ascertaining the size, length, weight, capacity, or other attributes of a target is referred to as "measuring." There are other phrases that are similar to "measure," but they differ depending on the objective (for example, "weight," "compute," and "quantify.") In general, measuring may be viewed as a single operation within the context of the word "instrumentation."



  • To display measured findings using values and symbols.

  • To employ measuring instruments.


  • To calculate a sum in order to attain a specified goal.

  • To utilise measuring equipment as needed.

It is equally correct to state that measurement is performed by a worker using a measuring system, whereas instrumentation is performed by a technician. This page focuses on measurement in the context of machine component design, manufacture, and inspection.

The Distinction Between Measurement and Inspection

The quantification of findings acquired by utilising measuring equipment is referred to as measurement. As such, inspection is the process of comparing the results acquired through measurement with accessible references to determine whether or not a product is acceptable. When measuring a length using a ruler, you can make a judgement based on the result, such as "The measurement is a touch too long/short." This finding is another way of expressing, "It has been determined that this value is slightly longer (or shorter) than the length of interest based on the value acquired using a ruler (measurement)." Although it is rarely necessary to utilise these definitions independently, it is a good idea to understand the distinction between the two.

Differences in Measurement Methods

A target can be measured directly or indirectly.

Direct Measurement

Direct measurement is performed by putting the target into direct touch with the measuring system in order to read the length, height, or other aspects directly. Although direct measurement allows measurement findings to be known as they are, mistakes may arise depending on the expertise of the person performing the measurement.

Indirect Measurement

Indirect measurement is accomplished, for example, by using a dial gauge to measure the height difference between a measurement target and a gauge block and then utilising that height to indirectly calculate the height of the target. Indirect measurement is sometimes known as "comparative measuring" since it is based on a reference.

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