The software system processes extracts reliable, significant and relevant patterns. System runs through preprocessing steps. System then generates the size 1 patterns. It then checks for both reliability and refinability of the size 1 patterns. System grows the refinable patterns by increasing the attributes and its values in the pattern by one at a time to find a size 2 pattern. The system then uses the number of pattern occurrences of size 2 pattern as a basis to find the reliable patterns. System also checks for statistical significance over the size 1 patterns and once again for the refinability of the size 2 patterns. System checks for relevance of the size 1 patterns by obtaining the disjointed record complement set. Software system readjusts the pattern statistics of size 1 and removes the non-relevant super-patterns. This process is repeated from size 2 to N.