A request for proposal for a specific program may require the company to review the bids to not only examine their feasibility but also the health of the bidding company and the ability of the bidder to actually do what is proposed.
The most obvious reason for using spatial imagery in metaphors is that the language of the primary processes (e.g., dreams) is spatial imagery. This can explain everything, but is trivial: it is always true, and you cannot make meaningful distinctions with it in a text or in changing contexts.
For spatial navigation in neuroscience, see spatial navigation (neuroscience). In computing, spatial navigation is the ability to navigate between focusable elements, such as hyperlinks and form controls, within a structured document or user interface according to the spatial location. This method is widely used in application software like computer games.