Dear Colleagues, Kindly advise me about the exact meaning of the "probability" as far as Risk Assessment Concern. Risk assessment probability there is two different understanding, 1- Regarding the Risk assessment probability there has two different understanding: * The first: the probability is related to the how frequent is the exposure to a certain hazard during activity (which im convinced about) and mostly the same will remain unless an Engineering solution is in place. eg. an electrician will expose to electrical for 10 times a day then the probability is the maximum whether precaution taken or not. However, the precaution will reduce the severity. *The second: the probability is about the how a certain hazard during a certain activity may cause harm, eg. what is the probability of a fire hazard to occur during FLT pre use inspection. 2- Is the maintenance an engineering solution or administrative to control the risk? from my point of view it is an engineering solution since the decision to hold a maintenance or to do it, schedule it, and frequency .. etc. shall be decided by an engineer. However management has to approve the regime. Could you please advise me with a reference if possible?

Hmm, I can foresee a number of different interpretations coming so I will get mine in first. In simple terms, the frequency of an event occurring will increase the probability of an adverse event. For example, if you cross the road a 100 times a day the probability of you getting hit by a vehicle is X. If you increase the frequency of crossing the road to 500 times a day your probability of getting struck increases exponentially. The controls to reduce the probability of an adverse event are many and varied depending on the type of hazard. Clearly where the frequency cannot be reduced other controls will be needed.