HP Outsourcing has the highest Net Promoter (NPS) score among IT service providers, according to a 2015 analysis of NPS scores among corporate technology vendors recently published by the Temkin Group.\nA company\u2019s NPS is considered a measure of customer loyalty and has been proven by some to be a leading indicator of corporate growth. Customers are asked to rank the likelihood they would recommend a brand to a friend or colleague on a scale of 1-10. Those who answer 9 or 10 are considered promoters: loyal enthusiasts who will keep buying and refer others to the company, thereby fueling growth. Respondents who answer 7 or 8 are considered passive customers: satisfied, but unenthusiastic and vulnerable to competitive offerings. Those who answer between 0 and 6 are detractors: unhappy customers who can damage a brand and impede growth with their negative word of mouth. The NPS is a straightforward calculation achieved by subtracting the percentage of detractors from the percentage of promoters, ranging range from -100 (all detractors) to 100 (all promoters).\n[ Related: Request for Solution: What some enterprises really want from outsourcing providers ]\nHP Outsourcing had a score of 52, according to the Temkin Group, which has been evaluating NPS results for 62 vendors for the past four years. The top IT vendor overall was SAS Institute, which scored a 57. Other outperforming IT service providers were IBM Global Services, Oracle Outsourcing, and Dell Outsourcing, all of which scored at least five points above the IT vendor average.\nHP, particularly the company\u2019s legacy EDS outsourcing unit (which HP acquired in 2008), and IBM Global Services have had consistently high NPS results relative to their peers for some time, says Bruce Temkin, managing partner of the Temkin Group.\nAccenture finishes at the bottom\nAccenture Consulting had the lowest NPS score, not just among IT service providers but among all the technology vendors in the report, with a score of just one. In fact, the other four lowest scoring vendors were also IT service providers: CA Technologies,\u00a0Hitachi, Wipro and Deloitte all had NPS scores below 10.\nWhile the scores for IT vendors overall improved to an average of 31.8 in 2015\u2014an increase of more than eight points after two straight years of declining scores\u2014many IT service providers (including Unisys, Capgemini, CSC, Cognizant, Infosys, ACS and Tata Consultancy Services) ended up on the bottom half of the list, according to Temkin.\nThe Temkin group also surveyed 800 IT decision-makers from large North American firms to learn about their relationships with their technology providers in order to determine the link between NPS and customer loyalty, customer satisfaction and other aspects of a good customer experience. \u201cWe often find a strong correlation between NPS and satisfaction if the satisfaction score is calculated in a similar manner to the NPS score. What's a more telling question is whether or not NPS correlates to customer loyalty,\u201d says Temkin.\n[ Related: Do you really want to win that outsourcing deal? ]\nThe research revealed that promoters are much more likely than detractors to spend more money with tech vendors, try new products and services when they are announced, and forgive their tech vendors after a bad experience. The report also revealed that SAS Institute and Cognizant were the top companies for purchase momentum and customers of HP outsourcing and Intel were most likely to forgive them for mistakes.\n\u201cIf tech vendors use NPS to identify and do less of what causes detractors and identify and more of what causes promoters, then they should see a lift in both NPS and sales,\u201d Temkin says.