For 2.4-GHz radio:
If interference is less than or equal to 50 percent, the score is 10.
If interference is more than 50 percent, the score is 0.
For 5-GHz radio:
If interference is less than or equal to 20 percent, the score 10.
If interference is more than 20 percent, the score is 0.
https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and- management/dna-center-assurance/2-2-
2/b_cisco_dna_assurance_2_2_2_ug/b_cisco_dna_assurance_2_2_2_ug_chapter_0110.html