Improving the safety of human life is one of the main tasks of scientific and technological progress. A dangerous situation occurs when a person is in a dangerous area, i.e. in a space where constantly, periodically, or occasionally there are situations caused by factors that lead to gradual or instantaneous damage to human health. Fire is one of these situations. The safety of technical systems is solidly linked to their reliability. In firefighting automation, the main purpose of calculating reliability is to determine the probability of failure-free operation of the equipment of the system. The value obtained is subsequently used to calculate individual fire risk. To ensure technical safety, it is a universal practice to use system approach and system analysis, which allows us to consider technical security as a system. One of the specific characters of determining the reliability of computer-aided systems is the difference between the reliability indicators of the main elements of the system and the automation system as a whole. The more complex the system, the less reliable it is. The article considers the main problems leading to the efficiency loss of particular items of equipment included in the technical safety systems and formulates the tasks and methods for their reliability assessment. The research features the fire safety system of an industrial building, which includes an automatic fire alarm system and a warning and evacuation system. The paper contains an example of calculating the reliability for an automatic fire alarm system. The authors propose some ways of improving the existing system. The results are processed and presented by the main indicators of system reliability, which are the failure rate and the failure-free operation probability for particular items of equipment and the system as a whole. The research revealed that a manual detector, used as a standby item in the system of thermal and smoke fire detectors, makes it possible to reduce the failure rate of the system and increase the average time of failure-free operation. Thus, it improves the indicators of the system reliability and increases the safety of industrial buildings.

Calculation of recipes of dough for bakery products is a significant and routine operation. Doughing is the main stage of technological process in bakery production. The quality of both the dough and the final product is caused by baking properties of flour and also a ratio of water, yeast, salt, sugar and cooking fat. The recipe of a bakery product is developed for the purpose of its production with the required properties due to assigned amount of components. Development of the automated calculator for calculation and correction of the recipes of bakery products is explained by the bakery technologist’s daily need in calculating the amount of components. Basic data for calculation are type, quantity and humidity of the main (flour, grain products) and additional components (sugar, butter, cocoa and others), amount of flour which is used for preparation of ferment. The technique of calculation of recipes of fermented dough and non-fermented dough is considered. There are panels for the choice of a way of doughing, for setting the amount of flour and grain products, and other components, setting additional data, and the result of calculation of recipes. The data found during the calculation of the recipe of bakery products come to the database and are used for controlling the recipes, for proper dosing. The programming language JavaScript with jQuery library is chosen. Programming is carried out in free source code editor Notepad++ The source code editor developed on the basis of Java technology has a number of advantages for industrial consumers. The main advantages are independence of the hardware platform and the operating system. Besides, development of the automated online calculator accessible on any personal computer connected to Internet network simplifies considerably the technologist’s work.