Validation process of a questionnaire: survey research on ISO 9001:2000

Abstract

Many papers about ISO 9001:2000 in the literature apply research survey as a methodology to obtain data from a sample. This approach attempts to discover relationships between variables within a population using questionnaires as measuring instruments. However, before making inferences, it is necessary to verify the validity of the questionnaire, that is, whether the instrument measures what is proposed to measure since the lack of a validation process could compromise the results found by researchers. Thus, this study aims to present a validation process of a questionnaire applied to certified and non-certified ISO 9001:2000 organizations. The steps taken in this process were content validity, exploratory factor analysis, construction validity, reliability and detailed item analysis.