Abstract: A decision making system is described whereby a method of performing a detailed level evaluation of one or more products or articles based on a decision makers response to one or more questions relating to the decision makers requirements is described. The method includes the decision maker responding to the question relating to the decision makers functional requirement or requirements taking into account a predefined result type. The response is compared with a product result where the product result reflects a particular functional capability of the article or product in relation to the particular question. This produces an evaluation ratio or series of evaluation ratios which are statistically analyzed to determine how well the product or article meets the decision makers requirements.