List of audit's questions were related to food safety requirements and consisted of two parts: part I corresponded to the implementation of HACCP system, part II corresponded to the functioning of the system in practice. The first part of audit consisted of 12 steps, according to the Codex Alimentarius (2003), which reflected 12 blocks of questions.
The second part of audit consisted of 6 blocks of questions covering the principles of HACCP system functioning in practice which were connected to employees and management.
For the evaluation of the audit criteria a rating scale consisting of four scores: 2, 3, 4, 5 was used. The adopted scale did not contained clearly defined center, which additionally lead the auditor to consider the assessment. The highest score (5) corresponded to conformity i.e. fulfillment of all requirements, and the lowest one (2) indicated the nonconformity (Table 1). It was assumed that only for 5 score the food safety was ensured and the final product was safe for consumers. The lists of audit's questions were prepared in the Excel file, and a mathematical formula calculating the evaluation data of each criterion according to the adopted scale was used. All criteria were evaluated and then the final scores for each block of questions were calculated.