Hello, I am writing a (mock) proposal for gaining some observation time on a telescope. One part that I am having a hard time with is, what considerations are made when deciding how large a field to survey? Are astronomers primarily constrained by the amount of time they are likely to be allocated, or are there some statistical arguments that go into how large a section of the sky must be observed? I would love to have a conversation here about the factors that come into play so that I can make a reasoned argument for the size of the survey I wish to make. Thanks!