In medical care, the Lab Equipments are the most common pieces of technical equipments often involved in incidents due to handling. In order to improve usability and reduce errors, by new user interface for too many lab equipments has been designed based on an analysis of observations, interviews, heuristic evaluation, reported incidents and theory about mental capacity and human error.

The purpose of this study was to determine whether or not the new interface would reduce the number of handling-errors and problems, and how it could be further improved. For this purpose usability tests were performed by lot of Lab Technicians from different hospital labs. The results showed that the number of handling problems were reduced for the new interfaces compared to the existing interfaces.