“…The more that service attributes are positioned on the extremity of this satisfaction axis, the more they contribute either positively or negatively to overall satisfaction; a folding of the axis then allows the categorisation of the service attributes into the four categories of key, secondary, basic and plus by the positioning of their points on the map. 5,22,24 Such studies as those by Bartikowski and Llosa, 22 Bodet, 25 Clerfeuille and Poubanne, 26 Lichtl é et al , 27 Poubanne et al , 7 Ray and Gotteland 19 and Sabadie et al 28 have used this method and confi rmed the existence of its four types of service-attribute contributions in such different sectors as catering services, medical and veterinary services, insurance services, energyprovision services, bank services, sport services and food retail stores.…”