VaRuN GRoVeR is the William S. lee (Duke Energy) Distinguished Professor of Information Systems at clemson university. he holds a Ph.D. in information systems from the university of Pittsburgh. he is currently working in the areas of It value, agility, and individual and organizational performance effects. he has published extensively in the information systems field, with over 200 publications in major refereed journals. Nine recent articles have ranked him among the top four researchers based on number of publications in the top information systems journals, as well as citation impact (h-index). Dr. Grover is Senior Editor (Emeritus) of MIS Quarterly, Journal of the Association for Information Systems, and Database. he is the recipient of numerous awards from the university of South carolina, clemson, association for Information Systems, Decision Sciences Institute, academy of Management, PriceWaterhouse, and others for his research and teaching and is a Fellow of the association for Information Systems.abstRact: this paper investigates how information technology (It) facilitates a firm's customer agility and, in turn, competitive activity. customer agility captures the extent to which a firm is able to sense and respond quickly to customer-based opportunities for innovation and competitive action. Drawing from the dynamic capability and It business value research streams, we propose that It plays an important role in facilitating a "knowledge creating" synergy derived from the interaction between a firm's Web-based customer infrastructure and its analytical ability. this will enhance the firm's ability to sense customer-based opportunities. It also plays an important role in "process enhancing" synergy obtained from the interaction between a firm's coordination efforts and its level of information systems integration, which facilitates the firm's ability to respond to those opportunities. We also leverage the competitive dynamics and strategic alignment literature to propose that the alignment between customer-sensing capability and customer-responding capability will impact the firm's competitive activity. We test our model with a two-stage research design in which we survey marketing executives of high-tech firms. Our results show that a Web-based customer infrastructure facilitates a firm's customer-sensing capability; furthermore, analytical ability positively moderates this relationship. We also find that internal 232 RObERtS aND GROVER systems integration positively moderates the relationship between interfunctional coordination and a firm's customer-responding capability. Finally, our results show that agility alignment affects the efficacy of a firm's competitive actions. In particular, action efficacy is higher when sensing and responding capabilities are both high.Key woRds aNd phRases: alignment, competitive dynamics, customer agility, dynamic capability, It infrastructure, It value, open innovation. the iNcReasiNG pace of GlobalizatioN, competitive rivalry, shifting customer demands, and rapid tech...