A | Capable in all components to a high standard |
B | Capable in all components to a satisfactory standard and high standard in many |
C+ | Capable in all components to a satisfactory standard |
C- | Capable in a majority of components to a satisfactory standard, inadequacies in some components |
D | Capable in a minority of components. No serious defects |
E | Capable in a minority of components. One or more serious defects |