Some Criteria of the Knowledge Representation Method for an Intelligent Problem Solver in STEM Education

Table 3

Levels of usability criterion.

Level 1	Level 2	Level 3	Level 4
(i) This method is not adequate to apply in a practical knowledge domain; (ii) The reasoning for this method is machinery; it is not natural	(i) This method is built for an educational knowledge domain; (ii) The system can only solve some classes of exercises as frames in a course	(i) This method can represent essential components of a knowledge model in an IPS: concepts, relations, and inference rules; (ii) The reasoning of the representation method can solve common exercises in the course	(i) This method can represent a knowledge model in an IPS system completely; (ii) The reasoning of the system uses heuristics rules to solve problems; (iii) The system can solve common exercises in a course. It can also solve some hard problems which need to combine the knowledge of the course for solving them