All requirements of the top-level functions must be met by the aggregate of those for all lower level functions. Data collection from the production line and their analysis were valid for a period of thirty months. When a System of Systems (SoS) is being developed, serial allocation of system requirements may be less suitable, and ensuring requirements loading is properly balanced between systems and that SoS requirements are covered (and not overly covered) by … allocation of R&M requirements for this optimal sub-system (or The basis However, the current literature lacks approaches that can help practitioners to systematically and automatically develop structured and configuration-ready PL requirements repositories. This method was developed for the needs of the Army of the Czech Republic, as means of facilitating decision making in the acquisitions process. suitable for upgrading. Allocations = allocating requirements to structures, allocation behaviors to structures, allocating logical structures to physical structures and allocating resources to structures (eg mass, power, cost, throughput). The well-known fo. The operator should set the reliability targets of the railroad system and sub-systems because the reliability affects the expected number of years when the penalty is imposed. algorithm that makes it possible to partition easily, directly, and By using GA, the approach is formulated with three major schemes, namely the fitness evaluation, solution encoding, and genetic operation schemes. The weight-factors also have to, sub-system availability. The paper deals with the possibilities of allocating reliability requirements for the pantograph system of a high-speed train. Original availability of system (before upgrade). Traditional systems engineering requirements allocation follow a serial process to assign individual systems to execute objectives. Among other findings, the results of, this analysis showed an unsatisfactory level of vehicle, availability. which is applicable in upgrading technical systems. The method allows the, allocation of requirements for availability directly, system level to sub-system level. If you were doing a true top-down system engineering (SE) process, at the time of allocation there are no requirements at the next level. Proceedings of 1998 FISITA -World The analyzed data include also the, infant mortality portion, because the used in, does not allow separating it. which is more suitable for the following solution: The next basic task consists of obtaining a relationship, between reliability parameters of the system and parameters of, the sub-system. The implementation of such an approach is based on a Product Upgradability Index (PUI) model and aims to maximise the Upgradability Efficiency (UE) of a design within specified engineering, economic, and environmental constraints. In the second case, the method evaluates maintenance costs which are closely associated with the reliability level of vehicle and which usually represent a significant part of the total ownership cost of each vehicle. The Goal Programming model developed in the paper can be easily solved using software such as LINDO, LINGO and Excel Solver. The article presents the procedure of reliability allocation for this specific system. Using some pantograph configurations (e.g. model. It traces requirements to the elements in the system model. During synthesis, systems engineering together with representatives of hardware, software, and other appropriate engineering specialties develops a system architecture design that is sufficient to specify the performance and design requirements which are allocated in the detailed design. Requirement definition, allocation, decomposition, is a complex systems engineering task. In this paper, an optimisation approach is presented to facilitate the search for the optimal design solution for a product's upgradability. The design is documented with block and flow diagrams. Holub, R. and Vintr, Z: "A Method of Technical and Economic The model allows testing a system-availability response to When comparing SimPL and CBFM, no practically significant difference was observed, and they both performed well when integrated with Zen-ReqConfig. availability to a required level with minimal design changes. – The paper provides information about the current scenario and also about the past scenario of RAMS engineering in research and industry. For this reason, it was decided to upgrade vehicle, design in order to (1) enhance operational readiness of the, vehicle, (2) improve the degree of mission success, and (3), reduce the demand for maintenance manpower and logistic, The requirement for updated-vehicle availability was clearly, stated following a detailed analysis of operational and tactical, demands. of original design are available and the requirement for the Systems engineering then establishes performance requirements for each function and sub-function identified. The article analyses problems with estimation of a number of failure occurrence over a warranty period and estimation of costs related to repair, Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in, Access scientific knowledge from anywhere. During the allocation process, systems engineering allocates performance and design requirements to each system function and sub-function. changes of sub-systems availability. Originality/value – This paper offers help to researchers in understanding the current and past status of RAMS.

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