Satisfaction surveys are well-known in the consumer industry. You try a product and fill out a questionnaire about what you liked, disliked, and whether or not you would buy that item.
As a commodity, quality-of-life is a little more difficult (but not impossible) to quantify and measure. For example, satisfaction surveys for orthopedic patients might include statements like:
You would rate each statement as definitely true, mostly true, don’t know, mostly false, or definitely false. Each one of those answers would be given a point value. When all added up, your answers would total a score that fell into a category such as most satisfied, satisfied, unsure, dissatisfied, or most dissatisfied.