| 摘要 |
Customer service evaluation system through cards, which consists of a card bearing three relief illustrations, representing effigies of a human face each with a different expression meaning "very pleased", "pleased" and "dissatisfied", respectively; by the same token, the card is provided with perforated areas which will be torn off by the customer in correspondence to the effigy expression that most aptly suits his or her opinion of the product or service rendered by the business establishment. |
