The present invention provides method and system for identifying a faulty component in a group of components, the group comprising in a connected configuration at least a first component connected to a second component, and further connected to at least a third component. In an embodiment, the method comprises: (i) monitoring for at least one fault at a component connection interface; and (ii) upon detection of a fault, identifying the faulty component utilising information from the fault and at least one rule for identifying the faulty component. The rules are defined from at least one characteristic of the fault, such as location and frequency, and at least one characteristic of the configuration.