Answer / manivelan

Qa means to take preventive action to take particular product like u check all dimension & measuring method is correct or not  Qc mean concern may rise after FG PART the corrective action takes place

Answer / vinayan

DEAR,

QC- means quality control, in which u must conntrol the
quality parameters

QA- means quality assurance, through QC u can ensure QA

Answer / himanshu

they are same

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what is meant by parallax error

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