The present invention provides a computer-implemented method of predicting the temporal fragrance profile of a fragrance composition comprising a plurality of fragrance ingredients, the method comprising using a processor to:



retrieve a diffusion measure of how fast each fragrance ingredient diffuses into a headspace;
form groups of fragrance ingredients having the same or a similar diffusion measure;
determine the olfactive contribution of each fragrance ingredient;
calculate the total olfactive contribution of a group of fragrance ingredients as the sum of the olfactive contributions of all fragrance ingredients forming said group;

and using a graphical user interface (GUI) to

display the total olfactive contribution of each group of fragrance ingredients in the order of their respective diffusion measures to visualize the temporal fragrance profile of the fragrance composition.




It further provides methods of adjusting and/or balancing the temporal fragrance profile of a fragrance composition.