Gruen's vision was to create a shopping atmosphere where people felt so comfortable, they would spend more time in the environment, thereby enhancing opportunities for purcahsing. The original Toad Lane Store, Rochdale, Manchester; one of Britain's earliest co-operative stores While the arcades were the province of the bourgeoisie, a new type of retail venture emerged to serve the needs of the working poor. In the 15th century the Mexica Aztec market of Tlatelolco was the largest in all the Americas. The main characteristics of a company's product assortment are: For example, in the dairy trade, cheese and butter was sold by the members of two craft guilds i. The Piccadilly entrance to the Burlington Arcade in —28, shortly after its opening "In speaking of the inner boulevards, we have made mention again and again of the arcades which open onto them. The fashion show, which originated in the US in around , became a staple feature event for many department stores and celebrity appearances were also used to great effect. The English monarchs awarded a charter to local Lords to create markets and fairs for a town or village. Markets sold fresh produce; fruit, vegetables, baked goods, meat, poultry, fish and some ready to eat foodstuffs; while fairs operated on a periodic cycle and were almost always associated with a religious festival. Customer service training entails instructing personnel in the methods of servicing the customer that will benefit corporations and businesses. Product assortment[ edit ] A typical supermarket carries an assortment of between 30, and 60, different products The term product assortment refers to the combination of both product breadth and depth. It focuses on customer relationships, stressing the importance of added value, customer satisfaction and highlights how the store's market positioning appeals to targeted groups of customers. Braudel and Reynold have made a systematic study of these European market towns between the thirteenth and fifteenth century. However, improvements in transport and postal services, led several entrepreneurs on either side of the Atlantic to experiment with catalogue sales. The trappings of a modern shop, which had been entirely absent from the sixteenth and early seventeenth century store, gradually made way for store interiors and shopfronts that are more familiar to modern shoppers. Market towns dotted the medieval European landscape while itinerant vendors supplied less populated areas or hard-to-reach districts. He went on to design some 50 such malls.