Notwithstanding its positive characteristics and enormous potential, IT has become a difficult challenge for researchers and managers. In 1987, Nobel Prize Laureate, Robert Solow remarked that computers appeared everywhere except in the productivity statistics. The shift from a manufacturing-based society to an information-based society became one of the reasons for the revision of the dilemma between IT-use and individual productivity. In an information-intensive environment it becomes increasingly difficult for managers to control the production process, a consequence of a lack of scientific-based approaches in the measurement of information worker productivity. Moreover, the impact of IT-use on productivity of individuals employed in information-intensive occupations is little understood and rarely modelled. Current studies on information worker productivity have succeeded to uncover some new patterns regarding information worker productivity and IT-use. A critical evaluation of these studies with regard to its strengths and limitations reveals some important challenges, which in turn lay a foundation for the herein proposed empirical study that aims to advance further understanding of the underlying mechanisms of information worker productivity and IT-use in terms of four information handling functions - generation, transfer, storage and transformation. The proposed study aims also to add to the growing body of understanding both intra- and inter-project multitasking practices and their impact on individual productivity. A better understanding of how IT-use can contribute to business value and what productivity benefits IT-use can provide the information worker is presented in this study from the perspective of both a descriptive and normative research approaches, which is applied through a set of case studies, quantitative surveys and experiments. The principal product of the research will be an inventory of a set of patterns of IT-use for the improvement of information worker productivity at the individual level based on intermediate business-process metrics of precise information worker’s workflow with interaction to IT-use.