ABSTRACT
Over. the.years. increasing.attention. is.being.given. to. improve.quality.of.products. and.services.in.the.industrial.sector..This.has.resulted.in.the.development.of.many. quality.improvement.methods..Some.examples.of.these.methods.are.control.chart,. quality.function.deployment.(QFD),.and.cause-and-effect.diagram.1,2.The.application.of.methods.such.as.these.has.been.quite.successful.in.improving.the.quality.of. industrial.products.
