The content of this article is the proposal of process of the safety analysis for complex dynamic systems. The safety analysis is carried out in process of the proposal of control system for safety-critical processes. In preliminary hazard analysis is done the identifying all possible risks by PHI method. The PHA method is used to analyze these risks. The method of safety analysis depends on various safety-critical states of system which are system are controlled by models. We propose to use the method SQMD for modeling these states. This method combines qualitative and quantitative methods of modeling states and takes advantage of both methods. The model of the proposal is shown in the diagram. The article includes detailed description of the tasks for each step of analysis.
A lot of papers describe three common methods of data selection from primary systems. This paper defines how to select the correct method or combinations of methods for minimizing the impact of production system and common operation. Before using any method, it is necessary to know the primary system and its databases structures for the optimal use of the actual data structure setup and the best design for ETL process. Databases structures are usually categorized into groups, which characterize their quality. The classification helps to find the ideal method for each group and thus design a solution of ETL process with the minimal impact on the data warehouse and production system.
This paper defines how to select the correct method or combinations of methods to minimize the impact of production system and common operation. Before any method is chosen it is necessary to know the primary system and its databases structures for optimal use of the actual data structure setup and the best design for the ETL process. Usually databases structures are categorized into groups, which define their quality. Classification helps to find an ideal method for each group and thus design the solution of the ETL process with minimal impact on the data warehouse and production system.
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