Smell research makes it possible to test the acceptance of different smells for selection purposes, to compare their status to that of the competition, the extent to which they fit the product and/or brand and so forth. Another purpose of smell research is to identify whether consumers notice any difference between products whose smell has changed following the replacement of scent extracts, raw materials or manufacturing conditions. Smell studies are conducted through quantitative research among a target audience or  expert panel for quality control purposes.