Venture Cap due diligence

VCapitalists analyse all issues of a potential investment opportunity. the firms biz plan must be “internally consistent” What does internally consistent mean?

I don’t really know but I’m analyzing the biz plan of a start up right now. I’m making sure that whatever assumptions they use for sales growth translate to their financials in terms of costs, need for hiring, etc… I think startups typically overestimate revenue and underestimate costs, so the VC’s make sure nothing is overlooked.