| Main model references | |
| Logical basis of model | The gap between expectations and perceptions of quality services |
| Formula | Wi-SQ (Pij-Eij) |
| Applications | In order to measure of quality services for enterprises and institutions. |
| Advantage of model | 1- Easy to understand 2- acceptance as broad and inclusive property 3- The perception of attractiveness 4- Multidimensional 5- According to the views of rural residents to assess the quality of services |