In Ashta-Kuta system of match making, the maximum number of Gunas are 36. If total Gunas between the couple are between 31 and 36 (both inclusive) then the union is excellent, Gunas between 21 and 30 (both inclusive) are very good, Gunas between 17 and 20 (both inclusive) are middling and Gunas between 0 and 16 (both inclusive) are inauspicious.
It is also opined that the above grouping is applicable when Bhakuta Kuta is favourable. If Bhakuta Kuta is unfavourable then union is never excellent, Gunas between 26 and 29 (both inclusive) are very good, Gunas between 21 and 25 (both inclusive) are middling and Gunas between 0 and 20 (both inclusive) are inauspicious.
It should be noted that Nadi Kuta is given supreme priority during match making. If Nadi Kuta is unfavourable then a match with 28 Gunas is also considered inauspicious.
Note - Mangal Dosha which is also known as Kuja Dosha is NOT considered while Ashtakuta match making. If Mangal Dosha is present then both Vara and Kanya should have Mangal Dosha. It is advised not to perform match making between Mangalik and Non-Mangalik couple.