Abstract

This thesis is composed of an article series on ERP (Enterprise Resource Planning) system in different situations with a diffusion of innovations adoption perspective. The purpose is to describe the ERP phenomena as it was 1994 and as it is 2005 and develop a holistic view framework on the ERP in its environment. The basis of innovation theory focuses on time and reveals a general maturing process in ERP use. The market forces the ERP artefact, its customers ’ use and the service providers forward. The four studies included describe the ERP life cycle, the elements of ERP, and customers ’ use, and a framework of a helpful ERP structure is created. The first article is on ERP migration strategy with the purpose of simplifying large corporations ’ portfolio of different ERPs. Configuration of a few consolidated ERP sites, with more users in each site, offers both great risks and great opportunities. The diffusion process of a consolidated ERP structure is discussed. The second paper investigates intra integration within the use of ERP systems. ERP implementation does not automatic realize high level of functional integration although the

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