The Net Promoter System has a mechanism called the inner loop that helps employees of all kinds get real-time feedback directly from customers. The feedback is usually positive—most employees do their job pretty well—so people typically become more engaged and enthusiastic. The occasional criticism or complaint about a specific interaction or decision can help individual employees and the organization learn to do their jobs better.

The challenge is to set up the inner loop in the right way, so that it reinforces learning rather than undermining it. 

In this short episode, Rob Markey discusses how the inner loop speeds learning. 

Learn more: The Net Promoter System's "Inner Loop": The Secret to Individual Learning and Connections with Customers