Obtain, calibrate, adjust and maintain the measuring equipment and instruments you need
Whatever business you are in, you must measure the outputs of your work to determine whether they have been done correctly.
Some measuring instruments are general-purpose, such as tape measures, scales, rulers, thermometers, and so on.
Some measuring instruments are specialized and are obtained for a specific use only, such as templates, gauges, and so on.
Some measurement methods are numerical or quantitative, such as length, diameter, weight, temperature, and so on.
Some measurement methods are descriptive, such as cleanliness, taste, degree of cooking, driving quality, the service provider's behavior, and so on.
Some product or service characteristics can be measured with instruments; others are assessed through the five human senses: sight, touch, taste, smell and hearing.
What do verification and calibration mean?
They mean checking a measuring instrument against a reference sample in an accredited laboratory to determine whether it is working correctly and, where necessary and possible, adjusting or calibrating it.
If the measuring instrument cannot be adjusted or repaired, it must either be accompanied by a correction table for its results or be taken out of service.
Important points:
A- Wherever possible, replace descriptive measurement with numerical or quantitative measurement to prevent subjective judgments.
If this is not possible, try to describe the required acceptance range clearly and make acceptable and rejected samples available to the people concerned.
For example, when painting a decorative product, the painted surface must not have runs, bubbles, unevenness, unpainted areas or accumulations of paint. As you can see, nothing explains these terms and conveys what we mean as well as a sample.
B- Every measurement error has a cost. The greater these costs, the more attention and planning you must devote to measurement methods and instruments.
Measurement errors usually take one of these forms: a sound item is mistakenly identified as defective and set aside, or, conversely, a defective item is mistakenly assessed as sound and delivered to the customer, causing dissatisfaction and returns.
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