Natchatira porutham basics of 12 should be considered; each porutham has specific rules and advantages for the bride and groom's life. Out of 12 astrologer must consider 2 porutham is rajju porutham and yoni porutham. If the natchatira porutham does not give a positive result, then the other porutham will not come for consideration. https://onepagehoroscope.com/accurate-thirumana-porutham