1. A method for determining a model for an arrangement of on-board instruments in a vehicle, the method comprising: constructing, with a processor, the model of the arrangement of the on-board instruments within an instrument panel based on a first type of information representative of the on-board instruments of the vehicle, and a second type of information representative of the knowledge that the user has concerning the use of the on-board instruments of the vehicle; acquiring data representative of at least one human activity which occurs during the interaction between the user and the on-board instruments, the acquiring of the representative data is achieved by at least one data-acquisition apparatus; analyzing, with a processor, the data that is acquired; and adjusting the model for the arrangement of the on-board instruments within the instrument panel as a function of the data that was analyzed so as to obtain an adjusted model that is different from the previously constructed model, wherein the configuration of information of the first type according to a multi-agent cognitive model includes the following steps for each on-board instrument: determining tasks relating to the use of the vehicle and performed by the on-board instrument under consideration, determining agents of the multi-agent cognitive model relative to the determined tasks, and establishing a link between the determined agents of the cognitive model and identified functional zones of the on-board instrument under consideration.