## 2 Materials and Methods
### Factors and Indicators
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Factors** & **Indicators** & **References** \\ \hline \multirow{5}{*}{Environment (\(E\))} & (\(E_{1}\)) Level of legal procedures implemented (\(E_{2}\)) Number of external funds for OHS system improvement (\(E_{3}\)) Level of networking with related companies in communities of practice (\(E_{4}\)) Frequency of coordinating activities with contractors (32; 36; 37; 38; 39) \\  & (\(E_{5}\)) Level of implementation of standards and recommendations (\(E_{6}\)) Frequency of following technological solutions for OHS system improvement (\(E_{7}\)) Frequency of accessing external OHS data sources \\ \hline \multirow{5}{*}{Technology (\(T\))} & (\(T_{1}\)) Probability of failure (reliability) (\(T_{2}\)) Failure frequency (intensity) (\(T_{3}\)) Assessment and quantification of accidents (\(T_{4}\)) Number and assessment of incidents (\(T_{5}\)) Availability (\(T_{6}\)) Maintenance rate (\(T_{7}\)) Maintenance costs (\(T_{8}\)) Criteria for selecting the safety level (\(T_{9}\)) Mean time between repair or failure \\ \hline \multirow{5}{*}{Organisation (\(O\))} & (\(O_{1}\)) Analysis of the results of external OHS controls (\(O_{2}\)) Effectiveness of OHS resource management (\(O_{3}\)) Evaluation of the effects of OHS training (success and retention) (\(O_{4}\)) Number (percentage) of higher-risk work activities (\(O_{5}\)) Causes and consequences of adverse events and stressful situations (\(O_{6}\)) Average number of working hours of OHS training (\(O\)) Average years of service (work experience) (34; 42; 43; 44; 45) \\  & (\(O_{8}\)) Number of employees trained in first aid (\(O_{9}\)) Workplace safety assessment (higher-risk activities) (\(O_{10}\)) Number of OHS guidelines (\(O_{11}\)) OHS training plan by activity (\(O_{12}\)) Evaluation of the applicability of safety measures \\ \hline \multirow{5}{*}{Workers (\(K\))} & (\(K_{1}\)) Number of workplace injuries (\(K_{2}\)) Level of employees’ communication competence (\(K_{3}\)) Level of compliance with work procedures (\(K_{4}\)) Degree of employee satisfaction with safety and job conditions (\(K_{5}\)) Number of mistakes and errors during work (\(K_{6}\)) Index of skills and competencies (35; 41; 46; 47; 48; 49) \\  & (\(K_{7}\)) Presenteism (\(K_{8}\)) Absenteism (\(K_{9}\)) Assessment of work activities and safety measures implementation (\(K_{10}\)) Degree of creativity during work (\(K_{11}\)) Degree of satisfaction with the PPE used \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Factors and indicators. Organisational characteristics significantly affect OHS systems as they represent the basis for their implementation, ranging from adequate leadership style and risk management [42] to safety resource allocation [43], performance analysis [44], and the establishment of a safety culture [45]. Often, not without reason, they are considered key prerequisites for an effective OHS system. Regardless of how well-designed the OHS system is, its successful implementation depends on the activities of both the employers and employees. Their attitude towards protection and safe work practices depends on education and training [41, 46], risk perception [47], leadership abilities, problem-solving skills, and responsiveness in critical situations [48, 49]. All of these factors and indicators affect the success of the organisational system, both in terms of the core business operations and supporting activities. Safety, as a supporting activity, defines the specific needs and priorities that, within the organisation, should not be viewed as an additional cost, but rather as a foundation for successful functioning. This paper analysed OHS systems in small window- and door-fitting companies. The activities of employees in window- and door-fitting companies include installing doors, windows, and accompanying equipment such as gutters, window-sills, blinds, and mosquito nets. They also perform construction work including the dismantling of old windows and doors and the proper installation of new ones.