Table-5.

Level partition.

Factors	Notations	Reachability Set	Antecedent Set	Intersection Set	LEVEL
1	SAI	1,3,4,5,6,7,9	1,2,6,8,910,11,12	1,6,9	4
2	LOR	1,2,3,4,5,6,7,9,11,12	2,8	2	7
3	CDM	3,4,5	1,2,3,6,8,9,10,11,12	3	3
4	PDJIT	4,5	1,2,3,4,6,7,8,9,10,11,12	4	2
5	RG	5	1,2,3,4,5,6,7,8,9,10,11,12	5	1
6	SIOT	1,3,4,5,6,7,9	1,2,6,8,9,10,11,12	1,6,9	4
7	ESC	4,5,7	1,2,6,7,8,9,10,11,12	7	3
8	COVID	1,2,3,4,5,6,7,8,9,10,11,12	8	8	8
9	SBDA	1,3,4,5,6,7,9	1,2,6,8,9,10,11,12	1,6,9	4
10	TC	1,2,3,4,5,6,7,9,10,11,12	8,10	10	7
11	UB	1,3,4,5,6,7,9,11	2,8,10,11,12	11	5
12	LOP	1,3,4,5,6,7,9,11,12	2,8,10,12	12	6