Sampling Inspection Whenever a large number of parts are to be inspected, 100% inspection is not desirable. Firstly it is very expensive and secondly, the job will be very much monotonous for an inspector and due to fatigue of brain, he ...

Microprocessors in SQC SQC techniques involve collection, organisation, analysis, presentation and interpretation of data in a timely fashion. It thus calls for lot of record­keeping and performing calculations. With the advent of microprocessors, the task of operator is considerably simplified. Smart microprocessor-based ...

Statistical Analysers In normal practice, the statistical quality control techniques are not used directly on the shop floor. The inspector notes various readings on shop floor by gauges and with the help of these readings, the curves are plotted separately and ...

Regression and Correlation Many times we are interested in determining the relationship between the results of one test and the results of some other test conducted on the same specimen. An excellent example of such a case would be to find ...

Statistical Tests of  Significance Statistical tests of significance are very important tools in the hands of industrialists for taking decisions. The various applications where these tests could be applied in the industry arc of two kinds. (a)  (i)  To determine whether a given ...

Reliability and Life Testing Reliability may be explicitly defined as the probability that a system will perform satisfactory for at least a given period of time when used under stated conditions. The reliability function is thus same probability expressed as a ...

Sampling Plans for Inspection by Variables for percent Defective Here we shall be dealing only with the single sampling plans, and not double and multiple sampling plans which are found to be rather complicated for practical use. For these plans it ...