When you need to quickly go up or down in case of emergency the optimum solution usually are among the rope-based systems. These can be manual and developed for one user or for multiple users.
Raising and lowering yourself or another, let's say over a distance of 20 meters, can be time consuming and tiring. The speed can be a 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 is given why your choice should be simple and automatic.
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