“…Consideringthis information, and the similar conclusionsof Souza and Collaziol(2006), we can concludethat mostparticipating companieswere closer to theunderstanding ofDeming(1990)thanother authorswho have studiedthis subject.According toDeming,companies have noneed toquantify and controlthe QRC, which contradicts theadvocated, for example, by Juran andGryna(1991), Crosby(1994) andFeigenbaum(1994 Gryna(1991) andFeigenbaum(1994, it is important that the Portuguese companies with certified systems, not yetquantifyingtheirquality related costs percategory,they will make it, so they cancheckthe importance, distribution and temporal evolution of thedifferent sources ofcosts (SellésandCarbonell, 2002). Throughdetailed analysisof QRC, companies can obtain a set ofinformationthat allow them toundertake andintensify actionsto improvetheiroverall productivity, as indicated in theNP4239:1994 (IPQ, 1994).…”