Rescue & descent
When you need to quickly get up or down you will often find the most optimum solution among the rope-based systems. These can be manual and developed for one user or for multiple users.
Raising and lowering of yourself or another, let's say over a distance of 20 metres, can be time consuming and exhausting. The actual rate may be a crucial factor if you get into difficulties, so it is essential to choose a solution where this can be raised / lowered quickly.
Tall buildings, cranes etc. requires emergency evacuation systems, which often have to be able to function for multiple users. Often, little or no training are given which is why your choice should be simple and automatic.