Engineer's report
From Kerbal Space Program Wiki
The engineer's report is a feature added in version 1.0 that prevents potential errors on the craft.
It appears on the bottom-right toolbar in the SPH or VAB. It looks for and reports common errors, such as forgotten parachutes, legs, wheels, landing gear, or batteries, no control, or engines without fuel.
Images
Sample Engineer's Report. http://i.imgur.com/E3UG0y7.png