In: Operations Management
Now the supplier is offering Omni a quantity discount of 5% for orders over 1500 units and 10% for order over 6000 units. Omni currently orders 1,000 units 5 times a year to meet annual demand. Omni’s current cost is $3.00, and the selling price is $4.95. The order cost is $42 per unit and annual holding cost is $25%.
Based on the new discount policy, what is the best strategy for the purchasing manager to follow.
Answer: Order policy of 1500 units is the best
explanation:
Annual demand, D= | 1000*5 orders | 5000 | 5000 | 5000 |
Order cost or setup cost, S | $42.00 | $42.00 | $42.00 | |
item cost | $3.00 |
(1-0.05)*$3= $2.85 |
(1-0.10)*$3= $2.70 |
|
holding cost percent | 25% | 25.0% | 25.0% | |
holding cost per year, H= | holding cost percent*item cost | $0.75 | $0.71 | $0.68 |
Order quantity, Q= |
squareroot(2*S*D/H)= 748 |
1500 | 6000 | |
#orders per year = | D/Q | 6.68 | 3.33 | 0.83 |
Average inventory= | Q/2 | 374.17 | 750.00 | 3000.00 |
annual holding cost= | Q*H/2 | $281 | $534 | $2,025 |
Annual ordering cost= | D*S/Q | $281 | $140 | $35 |
Purchasing cost= | annual demand*item cost | $15,000 | $14,250 | $13,500 |
Total cost= | holding cost+order cost+purchase cost | $15,561 | $14,924 | $15,560 |
order policy of 1500 units has the least total cost