Abstract
Using structures from adaptive structuration theory as an analytic tool and analysing data from a four-year longitudinal case study, the present paper focuses on structures that inhibit and enable end-user adoption and use of an e-ordering system. The structures presented, including routines, culture and how to order and authorize in the e-ordering system, have not previously been discussed in e-ordering research. Structures found to influence endusers’ adoption and use of the e-ordering system are: the restrictiveness and comprehensiveness of the technical system’s structural features, the order, working and authorization routine in place prior to the e-ordering system, and how well these routines correspond with how to order and authorize in the system. Organizational culture was also found to affect end-users’ acceptance of the e-ordering system.