Autor: Jan Topi Tervo

Atlas Elektronik is a leading systems house for maritime electronics and stands for maritime security world-wide. Our combat and sonar systems are integrated on various naval platforms, like frigates, corvettes or conventional submarines. Besides building and integration phases for such systems, especially the operational phase of 25 or more years is a big challenge regarding reliability, maintainability and supportability. Special demands have to be fulfilled. To cope with these challenges in an early stage, the methods of Integrated Logistics Support (ILS) are implemented already in the design phase. Thus, it is possible to increase the operational availability while simultaneously reducing the life-cycle costs.

The investigation of dynamical properties considering job shop systems often employs discrete-event simulation. How-ever, to apply advanced analysis methods like Fourier and correlation analysis to the temporal evolution of important variables, time series are required, which comprise data taken in equally measured timesteps. Therefore sampling is applied. This paper investigates the definition of an optimal sampling rate, which ensures high quality data at a minimum of sampling efforts. Furthermore, errors occurring due to deviating sampling rates are investigated and summed up in qualitative error curves.

Job-shop-productions are facing high requirements due to the high diversity of manufactured products, changing lot-sizes and strongly cross-linked material flows. This situation is intensified by dynamic effects which are caused by non-linear dependences between the system’s parameters. The complex dynamics can affect the logistic performance of the system by varying stock-levels, rising cycle times or decreasing capacity utilisation. This paper describes an approach to analyse the effects of the factory planning process on the system’s dynamics, whereat the focus will be on the planning subtasks of dimensioning and structuring. This is expected to improve methods of design for job-shop-productions.

The implementation of object-identification without contact by Radio Frequency Identification technology (RFID) is in the meantime taken into consideration by many small and medium sized enterprises (SMEs) to enhance on the one hand their internal workflows in production and logistics and on the other hand to satisfy customer demands. However, in the last years only little or superficial knowledge of this technology has been acquired. Hence, qualified and certified training for dealing with RFID is highly necessary. Process security shall thus be guaranteed internally and uniform standards within the supply chain regarding the implementation and application of RFID, can be substantiated.

Production and logistics networks are distinguished by a permanently growing complexity and are nowadays more than ever forced to adapt fast to dynamically changing markets. These and other factors make an enterprise-spreading production planning and control more difficult. A new, promising approach is to take advantage of synchronisation phenomena in such dynamical systems. The production of individual enterprises in the network has to be synchronised on the basis of technical and physical aspects in order to render the whole network more efficient and more productive.