ABSTRACT

In this era of ever-growing competition, it has been realized by manufacturers in industrialized Countries that to be competitive in the international and local market ,the quality and reliability of the products produced need fo be improved. That the establishment of an industry should not be only emphasized on profit making but also specify quality standards of its products. Thus , highly artisans have striven to make it products distinctive through superior quality. Obviously ,the use of quality control has been in existence, but what is new about it is the use of statistical techniques which are helpful in maintaining and improving quality standards, hence termed as statistical quality control. Statistical quality control involves the statistical analysis of the inspection of data, which is based on sampling. The actual inspection system to be used depending on the nature of the possible faults that can occur, like in the 1 application of the principles involved in normal curve for determining the extent to which quality control foods have been met and for indicating whether r not the variation which may occur are exceeding normal expectation. These techniques were developed by W.A. Shewhart (1924).The problem he solved was that of checking on the consistency of manufacturer of a very large number of components. Also problem of keeping a production process at a specified stable level. And in consequence this has received widespread application in industries. In conclusion statistical quality control is simply a statistical method of determining the extent to which quality goals are being met without necessarily checking every items produced and for indicating whether or not the variation which occur are exceeding normal expectations.