Hermann Lödding’s research while affiliated with Hamburg University of Technology and other places

... The desire to produce a unique product affects the number of excess product components, which increase in enterprises and often do not go into the production cycle. It is essential not only to maintain flexibility in production and meet the needs of the customer but also to be able to put surplus or residual components into production to reduce the costs of servicing warehouse balances [2][3][4]. ...

Reference:

Development of a Smart Material Resource Planning System in the Context of Warehouse 4.0

... As in our previous system iteration, we are designing the DAS as a mobile web application that runs on a tablet. This selection is in line with study results from Piontek et al. [17], who identified tablets as a particularly accepted and effective technology for DASs in aircraft production. Following the procedure model of automated visual inspection of Keferstein et al. [5] we divide the process of our assisted visual inspection ( Figure 2) into the essential sub-steps of defect localization (2+3), defect image acquisition (4), segmentation (5) and annotation (6) (classification and detailed description). ...

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A digital assistance system leveraging vision foundation models & 3D localization for reproducible defect segmentation in visual inspection

... Two approaches enable the data flow of manual processes into a DT and ensure a correct data set, namely, replacing or updating analog measuring equipment with smart tools transmitting measured values directly, e.g., via protocols like MQTT or Bluetooth (e.g., shown in [49] for assembly processes). A prerequisite for the successful integration of devices is a flexible software environment that, on the one hand, handles the heterogeneity of the accumulated data and, on the other hand, is able to integrate the results into the digitally modeled QA process. ...

Reference:

Digital twins in aircraft production and MRO: challenges and opportunities

... Figure 6 illustrated the graph of average torques at L5 calculate from all subjects. In order to evaluate the mathematical model, this study compares the value of torque at L5 during bending with previous studies [31,32]. At time zero, subject was performing maximal bending. ...

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Dynamic Modelling of the Spine for the Estimation of Vertebral Joint Torques using Gordon’s Method

... On the other hand, setup times for changing between the setup groups can be sequence-dependent or groupspecific ( Figure 1, case "I"), which means that the average setup time on the production machine can be reduced by a corresponding dispatching rule finding a suitable path in the so-called setup matrix (setup time reduction). [19,17,10] As an example, it can be seen in Figure 1 that the sequence formation C-B-A-(C) results in a total setup time of 57 units per cycle, while another order sequence leads to significantly longer setup times. For instance, the family sequence A-B-C-(A) would result in a setup time of 75 units per cycle. ...

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Setup-optimised Dispatching At Work Systems With Pallet Changers

... Bill of Material (BOM) merupakan definisi produk jadi yang terdiri dari daftar barang, bahan, atau material yang diperlukan untuk merakit, mencampur, atau memproduksi produk jadi (Sikorra et al., 2016). Kedar (2017) mengatakan bahwa salah satu masalah yang sering dihadapi oleh perusahaan manufaktur adalah ketidaksesuaian terhadap BOM. ...

Reference:

Analisis Perancangan Stasiun Kerja dalam Memproduksi Produk Inalcafa Jacket dengan Lima Metode Line Balancing

... A complete model transformation is not always necessary. In certain cases, only information needs to be extracted from a system model, e.g. for the integration of design requirements in CAD or product architecture design [23]. This is particularly relevant for information that is used by multiple applications or transferred along the value chain and exchanged across multiple system models [24]. ...

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RSM-DT: Reusable System Models for Digital Twins by Utilizing and Automating SysML Profiles

... A procedure previously presented by the authors, inspired by the method of Trzyna, shows how companies can schedule standard orders using a throughput diagram [17]. The procedure requires comparatively few input parameters and enables effective scheduling on the level of the entire production. ...

Reference:

Determining Due Dates for Rush Orders: A Simple and Effective Order Acceptance Procedure

... As digitization grows in importance and capability to serve all kinds of processes, shipyards around the world have started to adopt and implement digitalized solutions for many of their work processes (Jahn et al., 2020;Sánchez-Sotano et al., 2020;Sullivan et al., 2020;Von Lukas Uwe, 2010). Due to their assistive functionalities for the dominant manual work processes, e.g., step-bystep guidance in a work task, these solutions are often referred to as digital assistance systems (Hinrichsen & Bendzioch, 2019). ...

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Tool or hassle?- Production workers evaluation of the potential of digital assistance systems on the shopfloor in shipbuilding projects

... Because of the turbulence that rush orders can cause, companies should consciously decide whether and to what extent rush orders offer an advantage [4,8]. ...

Reference:

Determining Due Dates for Rush Orders: A Simple and Effective Order Acceptance Procedure