The article presents the issue related with a proper preparation of a data sheet for the
analysis, the way of verifying the correctness and reliability of input information, and proper
data encoding. Improper input or coding of data can significantly influence the correctness
of performed analyses or extend their time. This stage of an analysis is presented by an
authorship questionnaire for the study on occupational safety culture in a manufacturing
plant, using the Statistica software for analyses. There were used real data, obtained during
the research on the issue of occupational safety and factors having the greatest influence on
the state of occupational safety.