1. A method comprising: receiving, by a first computer system, a first signal from a first appliance, wherein the first signal is indicative of a use of a particular consumable good; updating in a memory, by the first computer system, a current memorized state of at least one processing event, the current memorized state being based on i) the receiving of the first signal from the first appliance and ii) a previous memorized state, such that the current memorized state correlates with an estimate of the amount currently having been consumed of the consumable good; generating, by the first computer system, a first indication that the consumable good is to be reordered, based on the current memorized state in relation to a first predetermined criterion; and transmitting, by the first computer system, a reorder message to a second computer system, wherein the transmitted reorder message is based on the generated first indication, and wherein the second computer system is for processing messages representative of reorders of the consumable good.