The advantages of a two distinct units’ system are explored using the regeneration point approach and the semi-Markov process in this research. There is a single server that comes to the system as soon as it is needed and stays with it until both units are operating. When the primary unit (Unit A) fails, it is given priority for repair over the non-identical unit (Unit B). After repair, Unit A goes through an activation procedure, but Unit B does not require any form of activation. When unit B fails, the server inspects it to see if it needs minor or large repairs. After repairs, both devices are as good as new. Both units' failure times, unit A's repair time, and unit B's inspection time are exponentially distributed. Whereas activation time of unit A, and repair times of unit B follow the general distribution. Outcomes of the system model are exhibited graphically for constant values