What constitutes success in telehealth?

Before telehealth applications can be judged, there must be some general understanding about what constitutes success. At first sight it seems that defining success in a telehealth application should be relatively easy: a successful application is one that produces high-quality care at low cost. However, the calculation of cost requires some care, since it depends on assuming a particular financial perspective (the patient's, the health-care provider's, or society's) and is meaningless without a statement of the workload being handled. Other factors include the context in which the service is being delivered. Ultimately, the political imperative may override any rational judgement of success.