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[ 1 ] Gupta, R. K.; Belkadia, F.; Buergy, C.; Bitte, F.; Da Cunhaa, C.; Bürgin, J.; Lanza, G. & Bernard, A. (2018), „Gathering, Evaluating and Managing Customer Feedback during Aircraft Production“, Computers & Industrial Engineering, S. 559-572.
Abstract:
This paper proposes a systematic approach for gathering requirements during production through customers’ remote access to the partially and fully assembled aircraft and its modules. The paper also proposes an evaluation and management of these recorded requirements and their utilization in the development of an aircraft. Modular product architecture is used for the modular organization of the product, product-service, and production system for the gathering, evaluation and management of feedback for product development perspectives. A mobile and wearable augmented reality system is used to virtually walk through the partially or fully manufactured product and to compare the status of the production with the product model to be produced. Change requests are captured as customer feedback. The knowledge thus acquired can be overlaid (augmented) on the real product, i.e. the aircraft. This approach is able to record the dynamic requirements of targeted customers. These changes can be carried out in the current version of the aircraft, and also incorporated into future versions. The implementation using case studies is presented for gathering feedback during assembly as well as for evaluating and managing the recorded feedback for exemplary modules (cabin and galley) of an aircraft. The use of the evaluation results in the development of an aircraft is also presented in the paper.

[ 2 ] Hochdörffer, J.; Laule, C. & Lanza, G. (2017), „Product Variety Management Using Data-Mining Methods“. Proceedings of the 2017 International Conference on Industrial Engineering and Engineering Management (IEEM), Hrsg. IEEE, S. 1-5.
Abstract:
In decision making problems regarding production network design, product variety oriented planning of network structures and capacities is indispensable. Due to increasing product variety, related planning tasks have become more complex to account for the significantly varying production requirements of product variants. To create a consolidated and expressive decision basis, a methodology to apply cluster analysis on product portfolios is developed in this paper. The introduced clustering method is able to handle production process-related binary data and production capacity-related metric data simultaneously. By applying this method, the product portfolio is partitioned into clusters so that variants within a cluster have similar requirements regarding production capabilities and capacities. The developed method is applied to two data sets resulting in more efficient and more accurate problem solving in comparison to established clustering methods.

[ 3 ] Dackweiler, M. & Fleischer, J. (2017), „Automated local reinforcing of glass fiber-injection molded preforms with carbon fiber tapes“. 15th Japan International SAMPE Symposium and Exhibition, Hrsg. SAMPE Japan.
Abstract:
This paper presents a new approach of a manufacturing technique to produce locally reinforced glass-fiber-preforms in a completely automated process. The core-part of the preform is manufactured from omnidirectional glass fibers via the fiber-injection-molding process. The glass fibers are 50mm in length and combined with 10% of thermoplastic fibers to hold the preform in shape after pressing under increased temperature. These preforms infiltrated with resin can already be used in applications with low stresses. To improve the mechanical properties of the subsequent composite part this preform can be additionally reinforced with 10mm wide continuous carbon fiber tapes according to the results of a realized topology optimization in a further step. The continuous tapes are integrated with a newly developed process by blowing the continuous fibers into shaped channels and lay down the so created fiber-net afterwards onto the preform via a vacuum assisted handling operation. The results produced with the first realization of the prototype show opportunities and limits of the developed automated process chain. The preforms manufactured with this technique present a high potential for improvement through the reinforcement with a small amount of additional weight which leads to a high degree of resource saving compared to other manufacturing techniques for composite parts.

[ 4 ] Hochdörffer, J.; Hedler, M. & Lanza, G. (2018), „Staff scheduling in job rotation environments considering ergonomic aspects and preservation of qualifications“, Journal of Manufacturing Systems, S. 103-114. 10.1016/j.jmsy.2017.11.005
Abstract:
Demographic change is a well-known influencing factor challenging social security systems in industrialized countries. In a manufacturing context, companies need to cope with an increasingly heterogeneous workforce in terms of qualification and impairments, as well as an increasing average age. The development of more standardized processes and the trend to move towards shorter lead times, paired with demographic changes in the workforce, reveal a strong importance of staff planning. A short-term staff planning system which generates job rotation schedules taking into consideration workers’ qualifications, the workplace’s ergonomic exposure, and the most recent allocations of each worker is sought to ensure the right worker is allocated to the right work place at the right time. The arising complexity of such scheduling problems is met in this paper by using a linear programming based heuristic, which solves the scheduling problem gradually for each rotation round and generates a holistic job rotation schedule for an entire workday. The presented approach to short-term staff scheduling is implemented in a VBA-based software prototype and was tested in the final assembly line of a German automotive manufacturer.

[ 5 ] Götze, E.; Heinzel, Y.; Matuschka, B.; Zanger, F.; Schulze, V.; Rohde, M.; Krügelstein, A. & Franke, J. (2017), „Optimierung der Aktivlotzusammensetzung für Al2O3 und Herstellung von innenliegenden Leiterbahnen“. 8. Kolloquium Mikroproduktion, Hrsg. F. Vollertsen, J. W., S. 129-134.
Abstract:
Aluminiumoxidkeramik ist aufgrund des kostengünstigen Anschaffungspreises und des vielfältigen Einsatzgebietes die beliebteste Keramik. Aufgrund der stetigen Bauteilverkleinerung in mechatronischen Systemen, wie sie beispielsweise in der Automobilindustrie oder der Medizintechnik eingesetzt werden, werden einerseits die Herstellung von innenliegenden Strukturen und andererseits die elektrische Funktionalisierung der geschaffenen Grundkörper erforderlich. Für die Herstellung von Grundkörpern mit innenliegenden Leiterbahnen wurde konventionelles 96,0%-Al2O3 eingesetzt sowie LithaLox HP 500 der Firma Lithoz für die Fertigung von additiv aufgebauten Bauteilen. Die Konstruktion der Bauteile sowohl für die konventionelle als auch additive Fertigung enthält Grabenstrukturen unterschiedlicher Breite (0,05 mm – 4 mm) und Tiefe (0,05 mm – 1 mm). In einem anschließenden Fügeprozess mit einer ebenen Keramik entstehen aus diesen Gräben innenliegende Strukturen entstehen. Ein weiterer Fokus lag auf der Zusammensetzung einer Aktivlotlegierung aus Titan (3 - 5 Gew.-%), Silber und Kupfer, die sich aufgrund ihres geringen elektrischen Widerstands auszeichnet und somit als Leiterbahn eignet. Es wurden Pasten unterschiedlicher Zusammensetzung hergestellt, aufgetragen und thermisch mit der Keramik gefügt. Anschließend wurden Schliffe unter dem Licht- und Rasterelektronenmikroskop untersucht und einerseits die Titanausfällungen und anderseits die Anbindung an die Keramik bewertet.