Abstract
The Lean promise, to help organizations to improve their efficiency can also be applied to healthcare services. In this article we describe an application of the "Andon" concept for odontoiatric software. This concept is applied visualizing the treatment status in each room of a dentist using pre-attentive processing. As a result, a dentist or assistant is able to grasp immediately what is going on within the team, which rooms are free, and if special rooms with particular equipment (such as the x-ray machine) is available. The here described considerations can also be applied in other types of applications.