The method serves to calculate a start sequence or a stop sequence for an engine, said sequence comprising a plurality of cues at which predetermined actions should be performed in the control of said engine. The stairways have self-levelling steps to allow access to the work platform in all positions thereof between the collapsed and deployed positions. At that point, the magnitude of the programming pulses stops increasing and the programming pulses are applied in a manner to provide varying time duration of the programming signal between verification operations. 2D perspective-view or stereo in-situ photorealistic images of scenes incorporating these objects are rendered at the one or more sever computers, for subsequent remote viewing at the one or more client computers.