Utilization of the Asset Administration Shell to Support Humans During the Maintenance Process Maintenance is an important set of various activities related to preserving from failure or decline. Improper or lack of maintenance may result in excessive component wear, production quality deterioration, or even longer downtime. However, todayxe2x80x99s production facilities strive to devote the least amount of necessary maintenance time in order to maximize production time. Therefore, new solutions for deliberate and efficient maintenance are needed. The solution proposed in this paper benefits from the newest trends and innovations in industry, namely the Asset Administration Shell (AAS) which is part of the Industrie 4.0 (I4.0) concept. The AAS shall contain the maintenance submodel which shall be used for supporting humans during the maintenance process. The submodel provides a standardized description of required tools and parts as well as stepbystep instructions which also include safety concerns and multimedia files, such as pictures and videos. In this way, maintenance can be carried out more reliably, resulting in reduced downtime. In addition, feedback from the maintenance process shall be stored in the submodel and fed through an I4.0compliant network to other processes from different phases of the life cycle in order to improve them.

Discovery Service for Industry 4.0 based on Property Value Statements The German initiative Industrie 4.0 has introduced various new concepts, e.g., Asset Administration Shell (AAS), in the industrial automation which led to the increase of the available information in the network. Retrieving the endpoints where the data is located in the network became an essential task in order to establish an automated information exchange system. Various working groups have been formed to standardize the AAS structure. In this work, we propose a discovery server concept for asset properties using the standardized AAS. We reinforce the presented concept with a prototype implementation that uses queries to retrieve information based on the property value statement model specified in DIN SPEC 92000.