Table 2: User level, reliability range and behavior scale constrains.

Level	Name	Reliability range
1	ordinary user	(0,0.7)	(4,12)
2	advanced user	(0.7,0.8)	(12,50)
3	excellent user	(0.8,0.9)	(30,80)
4	Expert	(0.9,0.95)	(70,100)
5	advanced expert	(0.95,1)	(90,120)