Abstract: A method and a system are disclosed for determining an individual failure rate for at least one individual technical operating equipment. For the calculation, a data processing unit receives not only the statistical data and characteristics specific for the type of the technical operating equipment, but also valid characteristic data for the individual technical operating equipment are used. Furthermore, additional characteristic values are used that are derived from information about influences by the site of use and the mode of operation of the individual technical operating equipment in an industrial plant. On the basis of the operating equipment type-specific data, an individualized average failure rate can be formed. Characteristic values associated with the individual operating equipment are used for forming a correcting factor. By linking the average failure rate to the correction factor, the individual failure rate is calculated.

Abstract: A method and an arrangement for presentation of a graphical representation of a handwritten message on a graphical screen. Position data and time data are recorded, indicating positions and points of time for the handwritten message. An image area in the graphical representation of the handwritten message is identified based on said position data and said time data, the size of the image area being a subportion of the graphical representation of the handwritten message. Finally, display data is provided to a screen, which display data comprises a graphical representation of the subportion of the handwritten message in the identified image area.