I was always taught that project is something that has a defined endpoint (eg refurbish kitchen). However, it seems to me that some things which are not strictly projects, in that they don't have defined endpoints, might also be complex multi-step things, and would fit well into the "projects" category in a GTD system. An example might be "increase our sales".

Am I missing something, or is "projects" defined quite broadly in GTD such that open-ended projects could fit into the system just as well as conventional projects that have an end point?