) Both condition-based renewal and the renewal on the basis of a failure finding task may be applicable for a hidden function failure. What is the difference between these two approaches? (4 Marks) iv) In most cases a preventive maintenance program will require the system(s) that are to be maintained to be shut down to carry out the maintenance. List five key considerations in determining an appropriate system shutdown schedule. Explain how each of these could influence a decision on shutdown durations and intervals. (10 Marks) v) A planned audit is proposed to identify the efficiencies available under a preventive maintenance program. Outline the steps you would undertake to carry out the planned audit. (10 Marks