1) With reference to maintenance of electricity infrastructure, (a) on what date was (i) the maintenance philosophy model adopted by Eskom and (ii) was the model implemented and (b) how does the maintenance philosophy model differ from a planned maintenance model; (2) Whether the specified model has been adopted by and implemented at all power stations and across all electricity infrastructure in the Republic; if not, (a) why not and (b) on what date will it be implemented; if so, (3) Whether the model is being adhered to and implemented effectively; if not, what measures have been taken to ensure adherence and implementation; if so, what are the relevant details? NW4286E