A machine built for earthworks can sit under a highwall, on contaminated ground, in a structure that is still moving, or on a route that has not been cleared. The seat cannot. Converting plant that is already in the yard or already in theatre puts the machine on that ground and leaves the person where the slope, the plume or the fire is not. Nothing is procured, shipped, parked or fuelled: the capability arrives as a dock, a fit kit and a unit.
What that commits you to is a machine-specific conversion rather than universal autonomy. Each configuration is surveyed, fitted with its own kit, calibrated and recorded before the unit will move anything on it, and the unit checks it is on that machine before it holds any authority to move. The supported list grows one qualified configuration at a time. The line is engineered and sold by machine family, and behind each family sits a controlled list of the exact supported configurations; the machines page carries the seven families and what a survey asks of you.
The interface is the human interface. A mixed fleet of different makes and ages is therefore approached as one system rather than one program per make and year, and a machine with no CAN bus, no ECU and no firmware is worked the same way as new iron. The kit is engineered around six interface families that recur in every cab, and it reads the gauges and warning lights by looking at them rather than by depending on the machine's own bus. Older machines are often the ones with the seat problem. The CDNS Autonomy front door carries the shorter case for the line and its two profiles.
Each qualified configuration leaves a body of work behind it, and that body is what the supported list is made of: the physical interfaces to the machine's own controls, the control-geometry survey, the actuator calibrations, the perception configuration, the machine dynamics, the safety case, the operator demonstrations, the validated skill packages and the field-service procedures, all held against that one configuration and signed with it. None of it is assumed for a machine that has not been through the survey, the fit, the calibration and the bounded commissioning. Until it has, the unit will not move it. The how it works page carries the mechanism in full, and operations carries what a converted machine does across a working day.