If placed along a highway, a bluebird house should open parallel to, or away from, the road so the birds will not be hit entering or leaving their nests. Also, the openings should face toward a tree or shrub within 100 feet so young bluebirds have a place of safety for their first flight. Convenience. Bluebird houses should face open areas with few trees and low vegetation. This lets the birds see and capture insects.
leftover - a small part or portion that remains after the main part no longer exists remnant remainder, residual, residuum, rest, residue, balance - something left after other parts have been taken away; there was no remainder; he threw away the rest; he took what he wanted and I got the balance
Changeover is the time it takes to go from the last good part of one product run to the first good part of the next product run. Quick changeover is critical to Lean. It provides the flexibility to match the product mix to actual demand. In turn, this prevents the accumulation of inventory that can add cost and substantial waste to a value stream.