A system for controlling advancement of and access to product and for generating data associated with such advancement and access. Systems of this invention include a pusher system having a track, a pusher, and mechanisms for generating data relating to the movement of the pusher. Certain embodiments of the invention include a door assembly, which controls consumer access to product located behind the door assembly, a stop for limiting the forward progression of the pusher along the track, and mechanisms for generating data relating to when and/or for how long the door assembly is open.