The defects mentioned above, the author form an integrated first and second forms. Proposed improvements to form two-dimensional. Also, the model can also check out two indicators that are available at affordable and reasonable amount of the service machine to minimize the total cost.
According to The defects Above, The author Integrated The Model Ⅰ and Model Ⅱ. , proposed an improved two-dimensional model. The model can also determine the two indicators which are the optimal service rate and the optimal number of mechanical services to minimize the total cost.
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