IPSI will use a scientifically based and well researched state-of-the-art calculation method in the analysis of the collected results. Quality of results is ensured through the use of methods internationally recognised as best practice by the European Foundation for Quality Management (EFQM), the European Organization for Quality (EOQ), the European Performance Satisfaction Index (EPSI) and the American Customer Satisfaction Index (ACSI), among others. View The IPSI Model

ACSI – American Customer Satisfaction Index was established in 1994 and is a powerful economic indicator with a uniform and independent measure of household consumption experience. ACSI tracks trends in customer satisfaction and provides companies with valuable benchmarking insights of the consumer economy.
ACSI is published quarterly in the Wall Street Journal and covers 70 000 American consumers, and 200 companies in seven industry sectors.
The ACSI is produced through a partnership of the University of Michigan Business School, the American Society for Quality (ASQ) and GFI Group.

EPSI – European Performance Satisfaction Index is an instrument for monitoring, analysing and promoting customers, people and society in any business enterprise as well as in government and the public sector in general. It is based on the established EFQM Excellence Model developed during the last ten years.
A limited liability entity (EPSI-Rating) is formed between the European Foundation for Quality Management (EFQM) and the International Foundation for Customer Focus (IFCF).

EEI - The European Employee Index® is a survey of employee satisfaction in several European countries. The survey contributes to an understanding of how to attract, keep, and motivate qualified employees.
EEI is carried out once a year in selected European countries and in 2003 those countries include Denmark, Norway, Sweden and Finland. Additional countries will be involved in the survey in the years to come.
The Index has been developed by CFI Group and MarkedsConsult in co-operation with the Danish Centre for Management.