Browsing by Author "Pickl, Sebastian"

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Open Access
Analysis of the influence of screen size and resolution on work efficiency
(2014) Klinke, Hermann; Krieger, Christoph; Pickl, Sebastian
The availability of large high-resolution displays and high-bandwidth digital display interfaces allows us to conduct a user study that compares the effects of a large high-resolution display and smaller displays on productivity and satisfaction for complex office tasks, where we control for pixel density, color, brightness and contrast of the displays using a virtual machine and one single large high-resolution display connected to a single high-end computer. We discuss the advances and current state of display technologies that enable this study and we discuss how our study differs from earlier related work. Participants perform three abstract tasks that simulate complex office work on displays of three different sizes and resolutions but with the same pixel density. Both quantitative and qualitative data has been collected and analyzed. We describe the effects that larger displays have on task completion time, error rate and satisfaction compared to smaller displays. Results indicate that large displays significantly improve productivity of complex office tasks and that users prefer larger displays over smaller displays.
Open Access
Augmented reality for order picking using wearable computers with head-mounted displays
(2014) Pickl, Sebastian
Order picking - the task of assembling orders in a warehouse is still the biggest expenditure in modern warehouses, therefore it is worth it focusing new research on the improvement of technologies and strategies which support this task. The recent development and the enhanced availability of head-mounted displays (HMDs) prompts further research regarding HMDs as a supporting technology for industrial applications. Based on research in related topics and the precise analysis of the use case we composed a concept for a system that supports the order picking process with the use of HMDs. In order to evaluate the concept a prototype that implemented the features of the concept, was built. The range of functionalities contains real time visual user guiding, visual task support, context and much more important step awareness that exempts the user from additional work steps and instant feedback in case of wrong actions of the user which enables direct reaction to errors. Tough a comparative user study, we compared the prototype with two traditional order picking methods and another order picking support system that uses projections for user guiding. The results show, that our prototype shows the lowest occurrence of long therm errors with the downside of a higher task completion time. However the study proved that the concept is worth being taken into consideration and be improved in further research.