Service providers today are largely concerned with attracting and retaining customers. There are several reasons for this. Competition for customers is fierce in most industries, and as a consequence margins have become smaller. It is difficult to attract customers' attention when there is no coherent distinguishing theme, and moreover, many service providers voluntarily choose to be similar in appearance as well as in product range. Second, it is more profitable to sell to regular customers than constantly to acquire new ones (Rust and Zahorik 1993;Storbacka, Strandvik, and Grönroos 1994). Therefore, there is an increasing need to understand why customers switch to complement our knowledge about whether they are satisfied or dissatisfied.Interestingly, it has been shown that although customers may express their satisfaction, they nevertheless frequently seem to switch service providers (Liljander, Roos, and Strandvik 1998;Roos 1996Roos , 1998). This is because the level of satisfaction may indicate different messages (Stauss and Neuhaus 1996). Where competition is intense, Jones and Sasser (1995) found substantial differences in loyalty between satisfied and completely satisfied customers. Completely satisfied customers seem often to have had a long-term relationship with a firm's representative. This finding supports Grönroos's (1993) proposition that a stable customer base is a good measure of customer satisfaction.In a recent article, Bolton (1998) argues that there is no acceptance of service failures in relationships that are sustained over time. In other words, long-lasting relationships do not tolerate any service failures and relationships with many service failures are past relationships. In her study on the duration of customer relationships, carried out in the cellular communication industry, Bolton points out the significance of customer satisfaction in connection to switching. She argues that constantly occurring failures decrease the duration of the relationship, even though customers perceive satisfactory recovery. In other words, customers update their relationships according to an anchoring and adjustment process. Switching intentions occur rarely among those perceiving no problems with their service provider. Moreover, resolved problems cause less frequent switching intentions than unresolved prob-