In today's era of competitive world, it is less expensive to provide "great" service over "good service". The customer service company relies upon listening, analyzing and acting on it. Many organizations underestimate the impact and damage of various customer issues. This usually occurs because they are using data only from a single customer channel or taking into account their vocal customers only, limiting data to a single customer channel. If your organization works in silos, you may not have the complete picture especially if customers complain across multiple channels. This means if a company only counts the cases that complain on a specific channel, your view is limited to a small subset. Even if your organization counts all the complaints across all channels on a specific issue, it is likely that you'll still see a small percentage of the cases where customers are encountering these issues, because   majority of customers affected don't complain to the organization directly. In order to estimate more accurately and prioritize the impact of each customer concern organizations follows the following process. To know more:

http://www.informationweek.in/informationweek/news-analysis/271903/steps-measure-impact-silent-customers/