CC BY
15
Section 1. Information technology
https://doi.org/10.29013/AJT-21-5.6-3-5
Limanska Nataliia Vladimirovna, Senior lecturer, Department of Informatics National University of Food Technologies E-mail: limanskaya.nv@gmail.com
Hrybkov Serhii Vitaliiovich, PhD, Associate Professor, Department of Information Systems National University of Food Technologies E-mail: sergio_nuft@i.ua
CONCEPTUAL MODEL FOR REPAIR SUPPORT FOR BAKERY ENTERPRISE
Abstract: In order to evaluate the behaviour of the decision-making system to determine different strategies for its functioning, a method for designing a model of a real system and conducting experiments on it has been proposed.
The definition of the quantitative component of the repair team is presented, and the conceptual model of the busyness of the repair team of the bakery during the work shift is described.
Keywords: repair team, bakery, model.
Introduction
The technological development of the bakery industry depends in particular on a set of measures that include technical, economic, organisational procedures designed to improve the operability of the bakery. The planning method can improve not only the technological level of the production equipment, but also increase the volume of production, by raising the productivity of labour and ensuring maximum use of fixed assets.
The modern equipment in the bakery has a sufficiently high level of reliability. But during operation the condition of the equipment is constantly under the influence of various factors, operating modes and conditions. This reduces its operational reliability and increases the probability of failures [1].
The use of manufacturing capacities, labour and material resources, planning, incentives and improvement of working conditions - all these actions lead to improvement of internal management system of bakery enterprises.
The authors proposed in [1] a simulation model of the repair team enterprise, 3D model of equipment repair process and model of repair department of bakery, based on simulation software Anylogic, allow us to conclude the effective number of workers in the repair team. But they make it possible to carry out analysis of workload of worker of repair brigade during work shift.
In work [2] authors offer a simulation model of the process of repair service of technological equipment, which is developed in CPN Tools, based on Petri net. The model allows the chief engineer to react promptly
Section 1. Information technology
to the impact of indicators obtained during the preliminary stages ofvisualisation and verification of results, and to form the schedule of the department's work leaving the availability of equipment. The disadvantage of the developed model is its focus on the estimation of technical maintenance, which increases the reliability of equipment operation, but doesn't keep records of the equipment that needs re-repairs.
The task of production management in the condition of continuity of labor processes, remains relevant despite the fact that the need to plan and record the work of employees repair department of bakery enterprise, the organization of their working relationships in the team when applying labour standards has been considered by various scientists.
Objects and research methods. The effectiveness of the repair of technical equipment in the hol-acracy can be determined by the reduction of time spent on repair work, saving parts needed for the repair of equipment elements. With the continuous improvement of the qualifications of workers in the repair department there will be an increase in labour efficiency and savings in wage funds, as well as material resources.
When organizing the work of the repair team to determine its optimal composition, administration must assign to it a certain amount of work and range of equipment, production area.
To quantify the team composition the following formula can be used:
W = -L-, (1)
Af
wt
where
L - is amount of labour resources at the site in
r
which repairs are carried out,
Awt - is amount of working time of an employee of the repair department.
In this case, it is necessary to define the amount of work, taking into account the characteristics of technical equipment of technological line of bakery, labour intensity of each stage of work and production plan of the enterprise.
The authors proposed to develop a conceptual model, i.e. an abstract model that defines the cause-and-effect relationships inherent in the studied subject. It is necessary to:
• define the objectives of the simulation;
• form the quality criteria of the system that is being modelled;
• detail the model depiction;
• describe the input/output variables and parameters of the model;
• select functional dependencies that describe the behaviour of variables and parameters;
• describe the constraints;
• describe the conceptual model [4].
The model provides the formation of a request for repair of equipment for one repair team, which creates a queue for repair work. The worker of the team can be free or busy with repair work. If the worker is free, the worker executes the request from the queue. The request for repair is allocated according to the first-in-first-out principle and, after completion, is sent to the quality check of the work done, where, following Bernoulli's principle of the distribution of random variables, it is considered completed or sent for revision to the beginning of the queue of requests awaiting repair. Because it is necessary to fulfil all the repair orders received, the request can be processed the required number of times.
The model shows the workload of the work team during the shift, the number of completed repairs, the number of repairs the team failed to cope with and the number of fixes sent for revision.
Conclusion
In order to create effective models, one of the most important tasks of control system design must be realised. Namely, to identify the many environmental elements that are worth including in a system model that exists or is being built.
The developed model will ensure the reduction of costs of repair team maintenance, optimal use of working time as well as other parameters, connected with maintenance of technical equipment of bakery.
References:
1. Manokha L., Limanska N. Management of work of the equipment ofbakery production by construction of the optimum schedule ofplanned and preventive repairs // The journal Science and Education a New Dimension, - Vol. 8. 2013. - P. 137-140.
2. Manokha L., Limanska N., Rud S. Research of the model of the repair department of the bakery enterprise in the ANYLO GIC environment // Scientific journal "Energy and Automation", - Vol. 2. 2015. - P. 40-46.
3. Manokha L., Limanska N., Kiktev M. Modeling ofthe process of repair maintenance ofthe technological equipment of the bakery with the help of Petri nets // Scientific Bulletin of the National University of Life and Environmental Sciences of Ukraine. Series: Engineering and energy of agro-industrial complex, - Vol. 224. 2015. - P. 113-118.
4. Manokha L., LimanskaN. Systems modeling. Lecture notes. NUFT. 2014. - 199 p.
5. Zaitsev D. A. Switched LAN Simulation by Colored Petri Nets. Mathematics and Computers in Simulation, - 65(3). 2004. - P. 245-249.
6. Chernyaev A., Alontseva E., Anokhin A. Application of Petri nets for formalization of NPP I&C functional design, Proceedings of the International Symposium on Future I&C for Nuclear Power Plants: IS0FIC2017. - Gyeongju, Korea. 2017.
