► This study examined the impact of inspector and operation type on restaurant inspection scores and estimated the probability of each violation found by each inspector and operation type. ► The results of this study showed that inspector and operation type significantly impacted inspection scores. ► The estimated probability of each violation being found by inspector during a specific inspection of operation ranged from 0% to 47.9% and was considered as specific training needs for inspectors and restaurant managers. This study examined the impact of inspector and operation type on restaurant inspection scores and estimated the probability of each violation found by each inspector and operation type. General linear models and a logistic regression model were employed to analyze 1,067 regular routine inspection results. The results of this study showed that inspector and operation type significantly impacted inspection scores, explaining 28.07% of the variation in scores. A significant difference was found in the prediction of the probability of each violation found by inspector and operation type. The estimated probability of each violation being found by inspector during a specific inspection of operation ranged from 0% to 47.9%. The probability of each violation occurrence by inspector and operation type was considered as specific training needs for inspectors and restaurant managers. Possible implications are suggested for training programs for inspectors and restaurant managers to improve standardized results of inspection.