Assessment of Quality of Cloths Processed in Two Industries by Statistical Methods

Abstract

Various quality characteristics e.g. Mass/m, Breaking Strengths, Nos. of threads per decimetre, Heat shrinkage and Relaxation shrinkages all in warp and weft directions respectively; Polyester and Cotton contents (%), Water solubility and pH value of cloths i.e. plain weave polyester and cotton khaki or LBG (Light Blue Grey), purchased from approved sources by two different industries, have been assessed and compared by application of statistical methods e.g. Mean, Standard Deviation, Frequency Distribution, Process Capability Analysis, etc. Bivariate Process Capability indices and relationship between Breaking strength and Nos. of threads per decimetre in warp and weft directions respectively have been calculated and discussed. The causes of low process capability measures and high variability of various quality characteristics of cloths have been discussed in detail. Remedies for the improvement of their low process capability measures have been suggested.