Scientific research on employees during pre-implementation phases of human resource information systems (HRIS) is difficult for a number of reasons. First, the constraints of practitioner research in terms of sample sizes, compliance factors and difficulties with obtaining control or comparison groups discourage research initiatives. Second, project management methods that emphasize cost and time compliance often prohibit the types of delays that research can impose. This study attempts to use psychological research methods combined with project management techniques to inform HRIS implementation methodology. It provides a model of key determinants of successful information systems implementation that should be considered in future projects implementing information systems or other new technologies. This is a first attempt to discover effective implementation methodologies associated with HRIS in the pre-implementation phase. The research showed that a critical component for the success of the implementation of new HRIS systems is to understand the staff groups? particular needs, concerns and opinions. This study identified important factors associated with the implementation of new human resource information systems. From these findings we can see that the conditions that support successful implementation for HR staff differ from those for line managers. This information is important when designing implementation methodologies and change management strategies.