Based on these attributes and their levels, 48 descriptions of coffee types were possible (2 × 2 × 3 × 2 × 2). It was evidently impossible for respondents to indicate a preference for 48 product types. Conjoint analysis instead uses a fractional design, i.e., a systematic selection of a small number out of the full set of product profiles, while maintaining the coincidence of uncorrelated levels of different attributes appearing together. This design assures that an estimate of the importance of one attribute is unaffected by the estimate of other attributes. Using Orthoplan of SPSS, a fractional (orthogonal) design of eight product profiles was generated out of the set of 48 profiles