Process control measures in reaction to assembly adjustments in one-off production

The construction of large maritime structures requires the manufacture of higher order assemblies. A large number of components with different machining processes and different production sequences make it difficult to coordinate the overall process. In addition, high and long-lasting customer influence and continuous iteration loops mean that product adjustments are made repeatedly. Furthermore, the mostly manual manufacturing processes are difficult to calculate due to the uniqueness of many products in the maritime sector. Insufficient orchestration of the processes disrupts the flow of materials. Especially the integration of modified components is associated with an increased control effort. Longer waiting and throughput times are the result. In this article, the potential of optimized order release with a focus on constructively modified components is demonstrated with the help of comprehensive digitalization. In this context, the development of mechanisms for optimized scheduling plays an overriding role. In this respect, the special features of make-to-order production are the subject of the considerations. The characteristics allow specific control methods, but at the same time pose challenges for process design. Evaluations with regard to practical use provide information about the potential possibilities and the frequencies of taking action. The consequences of the action steps are also part of the present investigations.