Final answer:
The customer feedback system developed by Reichheld is called the Net Promoter Score (NPS). It measures customer loyalty and satisfaction based on their likelihood to recommend a company or product to others.
Step-by-step explanation:
The customer feedback system developed by Reichheld, in which every customer is identified as a "promoter", "neutral", or a "detractor" based on their response to a single question, is referred to as the Net Promoter Score (NPS).
The Net Promoter Score is a metric that measures customer loyalty and satisfaction based on their likelihood to recommend a company or product to others. It is calculated by subtracting the percentage of detractors from the percentage of promoters.
For example, if 70% of customers are promoters, 20% are neutrals, and 10% are detractors, the Net Promoter Score would be 60% (70% - 10%).