Disclosed is an infusion device controller, the infusion device controller being designed to control a drive for metered drug infusion out of a drug reservoir according to a set of infusion regimes. The infusion device controller is designed to control infusion in a series of scheduled infusion events, wherein the infusion device controller is further designed to determine, for an infusion event volume that is infused in a given scheduled infusion event, an assignment between volume fractions of the infusion event volume and infusion regimes in an interlaced manner.
