The concept of “Customer Value” is becoming increasingly used in business strategies and marketing literature in recent years. Specifically, it suggests that providing a higher value to customers represents a key element in the success of companies through the positive impact that satisfaction and loyalty it brings. Therefore, a better fit, relative to competition, between customers desired value and the offer of the provider allows the provider to gain a “competitive advantage” on its rivals. However, for this competitive advantage to last, it is important to pay particular attention to changes in the desired value. In fact, the more dynamic the environment, the higher the risk that the clients needs and wants will change. Neglecting desired value change, especially when they are pronounced, can jeopardize the competitive advantage previously acquired, and can even threaten the survival of the company. On the other hand, to anticipate desired value change allows the company to react quicker than the competition in developing an offer adapted to future client needs. It is within this context that this study aims to expand our knowledge on the main factors that trigger customers desired value change CDVC). In this respect, if the CDVC is not a random phenomenon, it is therefore possible to determine some of the causes of those changes, so that we may better anticipate what customers will value next. We will study the CDVC within the context of business-to-business relationship between professional service providers in information technology and communication ITC) and their clients within the segment of the big enterprises in Quebec. This study develops a conceptual model concerning the antecedents of the CDVC, which we later test. The developing and testing of this model was done in two phases: one exploratory and the other descriptive. In this model, the desired value and its changes are conceptualized in three hierarchal levels desired attributes, desired consequences, and desired end-states). The exploratory phase of the research verifies this concept by showing that the attributes of an offer are desired because they bring consequences, through their usage or possession, which, in turn, results in achieving certain desired end-states goals, objectives, organisational values) wanted by the client organisation. When it comes to the desired value change, the results of the descriptive phase confirm the “top-down” process of changes in different levels of the hierarchy of the desired value. The “top-down” process suggests that the higher levels of the hierarchy influence the lower levels. Therefore, desired changes in the end-states trigger desired changes in the consequences, which trigger in turn desired changes in the attributes of the offer. Because the desired changes in the end-states trigger changes in the lower levels top-down), the conceptual model focuses on the antecedents of the desired end-states. We will evaluate four antecedents of the desired changes in the end-states: the internal organisational changes, the dynamism linked with the external environment, the level of performance and the intensity of tensions within the customer firm. We will also test customer dependency towards their main professional service provider in ITC as a moderating variable in the relationship between the intensity of tensions and the changes desired. Our study contributes to the understanding of CDVC by showing that the internal organisational changes, stimulated by a dynamic environment, trigger desired changes at the highest level of the hierarchy i.e., the desired end-state). Moreover, a level of financial performance that is below expectations has a tendency to make the customer think twice about the offer and to modify its desired outcome by the “consumption” of the offer. Finally, the model suggests that the CDVC can be seen as the consequence or coping) of an emotional response resulting from the interpretation of the context appraisal). In this sense, the internal organisational changes and weak financial performances create tension within the organisation and can influence the customer, if dependent on its main professional service provider in ITC, to change its desired end-state. By referring to our results, the managers must frequently evaluate the customer desired value. In order to facilitate this, the hierarchy of the desired value offers a conceptual framework to measure and analyze that concept. More importantly, the hierarchy shows that the desired value is not only found on the level of the offers attributes. Consequently, it becomes necessary to understand and evaluate the higher levels of the hierarchy when developing solutions. The importance of the higher levels is also explained by our results, which show that the desired changes in the end-state are the ones that trigger changes in the lower levels. These results suggest that managers that are able to measure changes on that specific level of the hierarchy must change and adapt their offer accordingly. Finally, our study shows that certain factors can influence a client to change its desired end-state: changes in the internal organisation, the level of performance, the clients level of dependency towards his provider and tensions felt in the client organisation. It is therefore suggested to do regular follow-ups on those elements within the client-base in order to anticipate desired value change and therefore to be proactive rather than reactive in the development of offers.