This diploma thesis aims to elaborate and revise risk assessment. Risks and hazards are always present in the workplace. How to define risks and hazards, how to ensure occupational health and safety, how the risk assessment process is executed, how the risk assessment methods work (i.e. HAZOP, SWIFT, BIA) is presented and explained with thorough examples. Organizations must comply with legal requirements for occupational health and safety of all their employees, employers and customers. Ethical and environmental issues are important for an organization to maintain its safety, reputation and status. Advantages and disadvantages of being in an ethical workplace for an employer and employee are discussed from each of their perspectives. Different types of risk assessment are used in different areas of the workplace. The principles and procedures of OSH are presented in this thesis.
Qualitative research using the case study method is applied to perform this research. Using case studies provides detailed information on the dangers which occurred in past incidents, namely for scenarios that would include and assess risk assessment in more detail. The research areas are case studies from mechanical, electrical and chemical engineering fields, organizational health and safety with a thorough elaboration on risk assessment. The report includes the definition of risks and measures, the description of quantitative and qualitative measures to fully understand the risks. Hazards are classified and prevention methods are elaborated. Occupational health and safety are clarified. The importance of safety training and culture is expressed through the responsibilities of the employer and employees. There are several OSH tools and checklists to choose that would fit best for any company. The risk assessment process is presented in its definition, the importance of it as well as its benefits and side effects are given in tables and charts. Risk assessment methodologies such as brainstorming, checklists, HAZOP, SWIFT and Business Impact Analysis are explained with examples.
The example cases are studied and paired with their most suitable risk assessment method, explaining why the chosen method is remarkably suitable. Example charts and tools are provided in doing so. Finally, the hypotheses are discussed and evaluated in line with the thesis research, that is, to either accept, reject or fail to reject them.