CONCEPTS FOR MODELING THE QUALITY OF PERISHABLE PRODUCTS

It is generally accepted that the quality of perishable products depen ds on three factors: the product, the user and the market situation. I t is therefore difficult to define what quality is and how to control it. Decomposition of the effects of these factors on quality leads to a distinction between the assigned quality and the acceptability of a product. Assigned quality is the quality notion a consumer has of a pr oduct, and results from evaluating that product with respect to the co nsumer's specific criteria. Acceptability defines whether the consumer in a particular situation is willing to buy a particular product and is the result of relating the product's assigned quality to other prod ucts and to extrinsic factors such as the price. Product and consumer research focus on assigned quality, whereas market research focuses on product acceptability. Changes in assigned quality can be simulated w ith quality change models that consist of separate models for the qual ity assignment, for the product behaviour and for the product environm ent.