The study aimed to examine (1) internal quality audit relationship between internal control quality at Vocational High School and (2) internal quality audit relationship between decision-making quality at Vocational High School. The study, which relied on the quantitative approach, targeted 57 of A-accredited public and private Vocational High School in Solo Raya, which includes Surakarta City, Sukoharjo Regency, Karanganyar Regency, Sragen Regency, Klaten Regency, and Boyolali Regency. The questionnaires were adopted as a tool for data collection and the Structural Equation Modelling (SEM) with SmartPLS 3.0 Version software was used to analyses data. The study found that internal quality audit has a positive and significant relationship between internal control quality at Vocational High School. The study also found that internal quality audit has a positive and significant relationship between decision-making quality at Vocational High School.
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