Projects require a particular quality among its managers, producers or any envolved professional: pacience. In this case, pacience should always be the art of positively and actively wait for an answer, a confirmation, an approval that will decisively decide the course of a project. As you know, pacience is an inevitable fase of every project, plan or dream. Therefore, for down fases when you just want a "yes" answer, I just love Friedrich Nietzsche's phrase:
"You can bare any HOW if you have a strong WHY."
Hang in there. Be positive.