Engineering context-aware applications is a complex task. Not only the notion of context correspond to a large and complex notion, but its support on software applications involves multiple technical challenges and issues. Among these, the notion of Quality of Context (QoC) appears as a transversal concern affecting all the aspects of supporting context on such applications. Indeed, with the growing development of context-aware applications, it becomes essential to start considering quality of context on every step of the application development. The goal of this paper is to incite discussion on the issues related to supporting QoC on context-aware applications. Staring by considering the need of a context engineering process, we discuss the impact of considering quality during all steps of this process. Our goal is to promote quality concerns on a global context engineering approach.