As per the limitations of controlling, there are many areas in business where measurable standards cannot be set. Such areas are employees morale, job satisfaction and customer satisfaction. Thus, from this aspect, it is difficult to measure the customer satisfaction.
Even if a manager imposes a control system, it will depend more on his capabilities. He can initiate customer feedback and get information on quality of food, waiting time, service quality, attitude of waiters, etc. This information might be quite useful in finding the problem areas and thus the company can work towards improvement in customers' satisfaction.