Thesis (M.Eng.)--Chulalongkorn University, 2008

To develop the standard safety procedure for maintenance of petrol station. The selected case company is one of the international leading service providers in facility management. In Thailand, the company has provided maintenance service for a big name petrol company since 2001. However, during six years, the case company has persistently experienced accidents/incidents related to maintenance tasks. Even the recordable incident rate may not be so high, the recurrence of some incidents shows the weakness of safety system and the incident impact is always ruined the company and client reputation. This thesis is comprised of three parts. Firstly, the author reviewed in the past incident and the big picture of equipments together with their related maintenance tasks. And then, the potential failure modes were listed and classified into groups by considering the nature of failures. Next, the information from the study was analyzed further by applying Failure Modes and Effects Analysis (FMEA) in order to find to root cause of each failure together with the recommended action. And then, Pareto principle was applied for determining the major root causes to be focused. Finally, the proposals to cope with the potential root causes were implemented practically. Due to time constraint, there is only one recommended action was implemented. Even there is no incident occurred during implementation, the result in term of RPN did not meet the expectation and need to be improved. However, the feedback from sample contractor showed that the implemented action can help to mitigate risk in maintenance service by observing the working behavior of operators.