The ISO 9000 experiences of the same sample of organisations over a five year time period is examined in this paper. The responses to a questionnaire sent out at the end of 1999 to companies which had a reasonably long term experience with the ISO 9000 series quality system are analysed. These companies were ISO 9000 series certified before 1994 when the authors conducted their first survey on the same sample. The main aim is to explore the links between the motivation for undertaking the ISO 9000 series and continued certification, with the impact on the type of TQM practices that have been adopted after certification, and what kind of gains have been achieved. Challenges faced by these organisations over time are also addressed.

ISO9000, longitudinal research, sustainability, total quality management
Information and Product Quality; Standardization and Compatibility (jel L15), Firm Objectives, Organization, and Behavior (jel L2), Business Administration and Business Economics; Marketing; Accounting (jel M), Business Administration: General (jel M10)
Erasmus Research Institute of Management
ERIM Report Series Research in Management
Copyright 2002, T. van der Wiele, A. Brown, This report in the ERIM Report Series Research in Management is intended as a means to communicate the results of recent research to academic colleagues and other interested parties. All reports are considered as preliminary and subject to possibly major revisions. This applies equally to opinions expressed, theories developed, and data used. Therefore, comments and suggestions are welcome and should be directed to the authors.
Erasmus Research Institute of Management

van der Wiele, A, & Brown, A.M. (2002). ISO 9000 Series Certification Over Time: what have we learnt? (No. ERS-2002-30-ORG). ERIM Report Series Research in Management. Erasmus Research Institute of Management. Retrieved from