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How frequently should production run be made

A contractor has to supply 10000 bearings per day to a manufacturer, he can produce 25000 per day, holding cost is Rs. 0.02 per year, set up cost is Rs. 18. How frequently should production run be made

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This is the standard batch production model with,

d = 10,000,

r = 25,000,

h = $\frac{2}{365}$ and

s = 1800.


$$Q* = \sqrt \frac{2sd}{h(1 - \frac{d}{r})}$$

$$Q* = \sqrt \frac{2 . 2800 . 10000}{\frac{2}{365} .\frac{15}{25}}$$

$$Q* = 104,642$$

$$T* = \frac{Q*}{d} = 10.46 is\ the\ time\ between\ production\ runs.$$

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