Development of AHMES (Automatical Higher Mathematics Examination System) Using Rational Unified Process

Table 1

Difficulty level of the models.

Value D	Level	Description
D ≤ 0.15	1	Very easy
0.15 ≤ D < 0.4	2	Easy
0.4 ≤ D < 0.65	3	Common
0.65 ≤ D < 0.85	4	Difficult
D ≥ 0.85	5	Very difficult