there  are  many  types  of  ELV systems and not  all may  be  applicable in your  project. general  high  level  chain  of  activities after installation  for MEP hangers and supports will be to install the containment systems,, risers, first fix,  2nd  fix, final  fix and t&c. you may have to check the schematic diagrams to see how the elv systems are connected, for detailing and links. for example,  fire alarm systems usually have a fire control room, which is the central link of all the elv FA Systems. elv activities may have to be organized by floor and TR rooms controlling these elv systems. some projects have the IBM network to control the elv systems at the control rooms, hence an interface planning should be in your programme.  more importantly,  consider the testing and commissioning plan and program elv works accordingly.