© 2011 . P. Laxmi, A. Poongodai, D. Sujatha. This is a research/review paper, distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License http://creativecommons.org/licenses/by-nc/3.0/), permitting all non- commercial use, distribution, and reproduction inany medium, provided the original work is properly cited. Global Journal of Computer Science and Technology Volume 11 Issue 22 Version 1.0 December 2011 Type: Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Inc. (USA) Online ISSN: 0975-4172 & Print ISSN: 0975-4350 Extended Apriori for association rule mining: Diminution based utility weightage measuring approach By P. Laxmi, A. Poongodai, D. Sujatha Department of CSE Abstract - The field of Association rule mining is a dynamic area for innovation of knowledge through which uncountable procedures have been expounded. Recently, by including significant components viz. value (utility), volume of items (weight) etc, the researchers have enhanced the quality of association rule mining for industry by bringing out the association designs. In this note, a proficient methodology has been put forward based on weight factor and utility for effective digging out of important association rules. At the very beginning, a traditional Apriori algorithm has been utilized that make use of the anti-monotone property which states that if n items are recurring continuously then n-1 items should also recur by which the scores of weightage(W-Gain), utility(U-Gain) and diminution(D-sum), are derived at. Eventually, we derive a subset of important association rules through which EUW-Score is generated. The tentative outcome demonstrates the effectiveness of the methodology in generating high utility association rules that is profitably used for the business improvement. Keywords : Association Rule Mining (ARM), Recurrent item set, Utility, Weightage, Apriori, Utility Gain (U-Gain), Weighted gain (W-Gain), Diminution sum (D-sum), Exact Utility Weighted Score (EUW-score). ExtendedAprioriforassociationruleminingDiminutionbasedutilityweightagemeasuringapproach Strictly as per the compliance and regulations of: GJCST Classification : H.2.8