Statistical Quality Control -Sampling Inspection
Posted by mechlook info on November 28th, 2011 10:56 PM | Comments Off
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 ...
Statistical Quality Control -Microprocessors in SQC
Posted by mechlook info on November 22nd, 2011 08:05 PM | No Comment
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 Quality Control -Statistical Analysers
Posted by mechlook info on November 22nd, 2011 08:04 PM | No Comment
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 ...
Statistical Quality Control -Regression and Correlation
Posted by mechlook info on November 22nd, 2011 08:04 PM | No Comment
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 Quality Control -Statistical Tests of Significance
Posted by mechlook info on November 21st, 2011 09:26 AM | 2 Comments
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 ...
Statistical Quality Control -Reliability and Life Testing
Posted by mechlook info on November 21st, 2011 09:26 AM | No Comment
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 ...
Statistical Quality Control -Sampling Plans for Inspection by Variables for percent Defective
Posted by mechlook info on November 21st, 2011 09:26 AM | No Comment
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 ...