While these made to order designs are an essential aspect of service quality design, they are also a breeding ground for errors, i.e., in interpreting the special needs and in conforming to them. In addition, the special designs may require special pricing, again multiplying the chances of error. The consumer has extensive need for such assistance. In some cases his technological ignorance requires that qualified specialists be available to diagnose his needs, e.g., human illness or a television set which is out of service. In offering a design of service to thousands or millions of clients, the need for simplicity is absolute.
Some consumers are unable to understand printed instructions.
Many more consumers are unwilling to take the time to learn, and their unwillingness creates trouble for them and the company as well. In some countries the service industries teem with 'free' services which are provided to clients as part of the quality of design. For example, an automobile service station will clean the client's windshield and check the status of oil, batteries and tires while the pump is filling the fuel tank. It also provides washroom facilities for the travelers. Such auxiliary services are designed partly to meet competition and partly to meet a special need of consumers for 'well-being'.