The Health and Safety Executive (HSE) expects duty holders to use the Guideline as part of their overall approach to maintenance management. Alongside this HSE has a pro-active intervention programme with duty holders which includes checking on the effectiveness of their maintenance management systems, including safety-critical maintenance backlogs, on their installations. The programme is informed by the individual duty holder’s responses to the HSE maintenance management backlog questionnaire. HSE checks the effectiveness of the duty holder’s arrangements during its onshore and offshore interventions. HSE’s current focus is on the duty holder’s progress in clearing their safety critical maintenance backlog.