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Government agencies all over the world are making big investments for  developing information systems that open important data they possess to the  society, in order to be used for scientific, commercial and political  purposes. It is important to understand what value they create and how, and  at the same time - since this is a relatively new type of information systems  (IS) - to identify the main improvements they require. This paper contributes  in this direction by presenting a methodology for determining the value  generation mechanism of open government data (OGD) systems and also  priorities for their improvement. It is based on the estimation of a ‘value  model’ of the OGD system under evaluation from users’ ratings, which consists  of several value dimensions and their corresponding value measures, organized  in three ‘value layers’, and also the relations among them. The proposed  methodology has been successfully applied to an OGD system developed as part  of the European project ENGAGE (‘An Infrastructure for Open, Linked  Governmental Data Provision towards Research Communities and Citizens’), and  provided interesting insights and improvement priorities. This first  application provides evidence that our methodology can be a useful decision  support tool for important ODG systems investment, management and improvement  decisions.

A methodology for determining the value generation mechanism and the improvement priorities of open government data systems