• hazard
• risk
• safety
• SMS

According to the definition of the Safety Management Manual of ICAO, safety is the condition in which the possibility of damage to people or properties is reduces and kept under an acceptable level through a continuous process of hazard identification and risk management.
The Safety Management System (SMS) is based on an organized approach of safety management an effective SMS allows the hazard identification that could have consequences on the activities of the company, the assessment of the risks linked to those hazards and the individuation of priorities to be able to carry out proper mitigation measures to reduce the risks to a level as low as reasonably possible and acceptable.
The structure and the contents of SMS are essentially the same for every organization, but the details of the structure, the procedures to apply and the documentation should reflect the dimension, the complexity and the level of risk of the organization.
A company, to implement and organize a SMS, have to produce a document containing all the forms and procedures for the analysis of risks and safety: the Safety Management System Manual.
Before writing the manual, it was necessary to study the regulation regarding SMS, explained in the first four chapters, and understand how it can be implemented in an organization (chapter 5).
Subsequently, in chapters 6, 7, and 8, there is a short explanation of the characteristic elements of a SMS: safety assurance and promotion and hazard and risk management.
The last chapter explains haw the manual is checked and approved by the national authority.
Part II contains the manual, which chapter reflect the index suggested by all the aeronautic safety agencies, and the annexes there are all the documentation and the analysis I produces during my thesis period and from which the organization can start the continuing process of safety risk management and SMS.