1. External failure cost as a percentage of turnover <br>2. Customer satisfaction <br>3. Number of customer complaints <br>4. Customer PPM <br>5. Customer special status notification
1. External loss cost as a percentage.<br>2. 顧 the degree of hospitality.<br>3. 顧 complains about the second time.<br>4. Customer PPM.<br>5. 顧 special notice to visitors.
1. Ratio of external failure cost to turnover<br>2. Customer satisfaction<br>3. Customer complaints<br>4. Customer ppm<br>5. Customer special status notification<br>