'I think this image should be just as important as the image of the gate in Auschwitz,' says the US-based German historian Jürgen Matthäus. 'I think this image should be just as important as the image of the gate in Auschwitz,' says the US-based German historian Jürgen Matthäus. Thu 2 Oct 2025 03.23 EDTLast modified on Thu 2 Oct 2025 08.22 EDT It is one of the most chilling images of the Holocaust: a bespectacled Nazi soldier trains a pistol at the head of a resigned man kneeling in a suit before a pit full of corpses. The picture taken in today's Ukraine was long known, mistakenly, as The Last Jew in Vinnitsa, and was for decades shrouded in mystery. The US-based German historian Jürgen Matthäus has for years painstakingly assembled the puzzle pieces and, with the help of artificial intelligence, is confident he has identified the killer.

F\"ur eine fr\"uhzeitige Erkennung von Lieferengp\"assen m\"ussen Lieferketten in einer geeigneten digitalen Form vorliegen, damit sie verarbeitet werden k\"onnen. Der f\"ur die Datenmodellierung ben\"otigte Arbeitsaufwand ist jedoch, gerade IT-fremden Personen, nicht zuzumuten. Es wurde deshalb im Rahmen dieser Arbeit eine Webanwendung entwickelt, welche die zugrunde liegende Komplexit\"at f\"ur den Benutzer verschleiern soll. Konkret handelt es sich dabei um eine grafische Benutzeroberfl\"ache, auf welcher Templates instanziiert und miteinander verkn\"upft werden k\"onnen. F\"ur die Definition dieser Templates wurden in dieser Arbeit geeignete Konzepte erarbeitet und erweitert. Zur Erhebung der Benutzerfreundlichkeit der Webanwendung wurde abschlie{\ss}end eine Nutzerstudie mit mehreren Testpersonen durchgef\"uhrt. Diese legte eine Vielzahl von n\"utzlichen Verbesserungsvorschl\"agen offen. -- For early detection of supply bottlenecks, supply chains must be available in a suitable digital form so that they can be processed. However, the amount of work required for data modeling cannot be expected of people who are not familiar with IT topics. Therefore, a web application was developed in the context of this thesis, which is supposed to disguise the underlying complexity for the user. Specifically, this is a graphical user interface on which templates can be instantiated and linked to each other. Suitable concepts for the definition of these templates were developed and extended in this thesis. Finally, a user study with several test persons was conducted to determine the usability of the web application. This revealed a large number of useful suggestions for improvement.