Variation in the use of clinical resources, outcomes, costs, access to heal
th care and quality is a well recognized, ever present feature of health ca
re. It is a phenomenon that affects all sectors of the health care delivery
process and is important to clinicians, administrators and patients. As a
phenomenon variation can be appropriate or inappropriate and the eliminatio
n of inappropriate variation is a fundamental principal behind continuous q
uality improvement in health care. The primary tools for the management of
variation exists within the electronic medical record (EMR). The EMR utiliz
es the existing and evolving information storage technologies (data reposit
ories) and information management tools (applications), to integrate the el
ements within this long-term data storage. Through this integration the EMR
systems are able to provide knowledge representation in differing formats
to the decision-makers and this will facilitate more accurate and appropria
te decision-making with subsequent improvements in health care delivery. (C
) 1999 Elsevier Science Ireland Ltd, All rights reserved.