minimum PPE, in which it is necessary to formulate an application for the optimal
amount of personal protective equipment (R).
When calculating the given model, we obtain data on PPE stocks for a specific
period of time, the required quantity, deliveries, losses, costs.
To program the calculation of PPE stocks by minimizing economic costs and
productive resources, the Qbasic environment has been used.
The problem of calculating the required amount of PPE for specific production
situations is solved by using linear programming. Therefore, we will form the
economic and mathematical task of increasing the effectiveness of the organization
activities while providing PPE. When solving the problem, it is necessary to determine:
unknown values X
i
(variable tasks); the parameter that is the criterion for the efficiency
(optimality) of the solution, and the direction in which the value of this parameter
should be changed (up to max or min), i.e. to determine the target function L (x). Also,
it is necessary to consider which conditions for the variables must be fulfilled
(restrictions).
When solving the problem, we use the following relationships that take into
account the increase in productivity when performing production tasks using PPE.
Profit = Revenue (price for the services rendered during installation, repair,
monitoring) - Costs (cost price of services).
Gross Income = Revenue from services - cost price (including administrative
costs).
The given cost price of organization services (performed work) = costs /
normalized time with labor capacity of tasks variables.
Let X1 be a set of special clothing (indirectly represents the amount of work
performed using PPE when performing installation, repair or monitoring).
Accordingly, X2 – special shoes, X3 – other PPE, means of respiratory protection.
Limitations – the possible execution is limited by production capacities: with all
the values reduced to the uniform dimension and period - a month, and costs – to hours.
The volumes of work performed cannot be negative and should be integer.
We also take into account the limitations on workers' funds, considering the
number of workers, for example, 400 people and their possible reduction in calendar
months: May 400-16 = 384 people, June: 400-22 = 378 people; July: 400-15 = 385
people.
We take into account the restrictions on the effective use of time (working time
fund, productivity and labor capacity of operations).
Restrictions on the demand for PPE by months and on production costs.
Target function. Since it is necessary to distribute (form) a plan for the release of
workers, the maximization of work with a reduced number of workers will be an
efficiency criterion for the solution (i.e., indirectly reducing costs, cost prices if it is
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