Refer to the Requirements Development process area for more information about ensuring that the requirements reflect the needs and expectations of the customer. Refer to the Project Monitoring and Control process area for more information about taking corrective action.
pane. 1  one of the divisions of a window or the like, consisting of a single plate of glass in a frame. 2  a plate of glass for such a division. 3  a panel, as of a wainscot, ceiling, door, etc. 4  a flat section, side, or surface, as one of the sides of a bolthead.
A sash window. A sash window or hung sash window is made of one or more movable panels, or sashes, that form a frame to hold panes of glass, which are often separated from other panes (or lights) by glazing bars, also known as muntins in the US (moulded strips of wood).