Fragrance ingredient spatial recognisability prediction method to prepare a fragrance composition comprising said fragrance ingredient, comprising the steps of: - selecting , upon a computer interface, a measureable value representative of between one or two of the following parameters: - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum predetermined psychophysical intensity level, or - a quantity of the ingredient in liquid phase, wherein the selected value is selected within a range of at least two distinct values, - computing , by a computing system, a value representative of either one of the following parameters: - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum sensory intensity level selected or set by default, or - a quantity of the ingredient in liquid phase and wherein the computed value is representative of a parameter other than the parameter associated with the selected value and wherein a value for the parameter neither selected nor computed is set to a default value, said computed value being computed as a function of the parameter associated with the selected value and the value for the parameter neither selected nor computed, the ingredient being represented by an ingredient digital identifier corresponding to a physical ingredient to be used within a fragrance composition to be prepared as a function of the computed and selected values. - selecting , upon a computer interface, a measureable value representative of between one or two of the following parameters: - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum predetermined psychophysical intensity level, or - a quantity of the ingredient in liquid phase, - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum predetermined psychophysical intensity level, or - a quantity of the ingredient in liquid phase, - computing , by a computing system, a value representative of either one of the following parameters: - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum sensory intensity level selected or set by default, or - a quantity of the ingredient in liquid phase and - a minimum sensory intensity level, corresponding to a predetermined minimum psychophysical intensity for the ingredient, - a maximum distance, corresponding to a distance at which the ingredient is to be perceived at a minimum sensory intensity level selected or set by default, or - a quantity of the ingredient in liquid phase and <EOS>