A method of determining an action associated with an apparatus, the apparatus having a disposable component, the method comprising: obtaining (100), by means of a camera (416), data representing a visual code (301, 303) and a visual symbol (302, 304); comparing (120), by means of a processor (414), the visual code represented by said data with a reference code, the reference code indicating an identity of a disposable component of the apparatus, and comparing (130), by means of said processor, the visual symbol represented by said data with a reference symbol, to obtain comparison results; and determining (140) the action in response to the comparison results.