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Casa > Exposició > Contingut
Qualitat i inspecció
Mar 21, 2018

A continuació es detallen quatre categories bàsiques de costos de qualitat:

1, Prevenció - - costos incorreguts en la planificació, implementació i manteniment d'un sistema de qualitat que asseguri la conformitat amb els requisits de qualitat a nivells econòmics. Un exemple de cost de prevenció és la formació en l'ús del control de processos estadístics.

2, Avaluació: costos incorreguts per determinar el grau de conformitat amb els requisits de qualitat. Un exemple de cost de la valoració és la inspecció.

3, Falla interna: els costos que es produeixen quan els productes, components i materials no compleixen els requisits de qualitat abans de la transferència de propietat al client. Un exemple de cost de fracàs intern és ferralla.

4, Falla externa: els costos incorreguts quan els productes no compleixen els requisits de qualitat després de la transferència de propietat al client. Un exemple de cost de fracàs extern és reclamacions de garantia.

Encara que el nivell de control de qualitat es determina en gran part per la teoria de la probabilitat i els càlculs estadístics, és molt important que els processos de recopilació de dades sobre els quals aquests procediments depenguin siguin adequats i precisos. El millor procediment estadístic és inútil si es subministren dades defectuoses i, com els processos de mecanitzat, la recollida de dades d'inspecció és en si mateix un procés amb uns límits pràctics de precisió, precisió, resolució i repetibilitat.

Tots els processos d'inspecció i / o mesura es poden definir pel que fa a la seva precisió i repetibilitat, tal com s'avalua un procés de fabricació per a la precisió i la repetibilitat. Es poden realitzar experiments controlats i es poden realitzar mesures estadístiques dels resultats per determinar el rendiment d'un mètode d'inspecció relatiu a les parts a inspeccionar. La idoneïtat d'un o un altre mètode es pot jutjar a partir de les desviacions estàndard i els nivells de confiança que s'apliquen a cada enfocament que s'utilitza en una situació d'inspecció determinada. (la fi)

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