EOQ inventory model exam review

What does EOQ stand for?

EOQ stands for Economic Order Quantity. It's a formula used to determine the optimal order quantity that minimizes total inventory costs.

True or False: EOQ helps minimize total inventory costs.

True. The EOQ model aims to minimize the sum of ordering and holding costs.

List the main objectives of EOQ.

- Minimize total inventory costs - Optimize order quantity - Balance ordering and holding costs

What factors influence EOQ?

The main factors include: - Demand rate - Ordering cost per order - Holding cost per unit

Fill in the blank: EOQ formula is derived from the trade-off between _____ and _____.

ordering costs; holding costs

How does demand affect EOQ?

An increase in demand raises the EOQ, leading to more frequent orders and higher inventory levels.

Comparison: EOQ vs. Just-In-Time (JIT)

EOQ focuses on minimizing costs through optimal order quantities, while JIT aims to reduce inventory levels by aligning orders closely with production schedules.

What is holding cost?

Holding cost is the cost associated with storing unsold goods. It includes warehousing, insurance, and depreciation costs.

True or False: EOQ is only applicable to large companies.

False. EOQ can be applied by businesses of all sizes to manage inventory effectively.

What is the effect of increased ordering costs on EOQ?

Increased ordering costs will lead to a higher EOQ, as firms will order larger quantities to spread out the cost.

Describe the EOQ model in one sentence.

The EOQ model calculates the ideal order quantity that minimizes total inventory costs by balancing ordering and holding costs.

What happens to EOQ if holding costs decrease?

If holding costs decrease, the EOQ will also decrease, suggesting smaller, more frequent orders.

How is EOQ calculated?

The EOQ formula is given by: $$EOQ = \frac{2DS}{H}$$ Where D is demand, S is ordering cost, and H is holding cost.

What is the significance of the 'D' in the EOQ formula?

'D' represents the annual demand for the product, which is crucial for calculating the optimal order quantity.

What type of inventory system does EOQ model assume?

EOQ assumes a constant demand and lead time, meaning inventory depletes at a steady rate.

Define reorder point in the context of EOQ.

The reorder point is the inventory level at which a new order should be placed to avoid stockouts.

What does EOQ stand for?

EOQ stands for Economic Order Quantity, which is the ideal order quantity that minimizes total inventory costs.

EOQ Formula?

The formula for EOQ is: $$EOQ = ext{sqrt} \left( \\frac{2DS}{H} \right)$$ where D = demand, S = ordering cost, H = holding cost.

True or False: EOQ is always the same for every product.

False. EOQ varies based on demand, ordering costs, and holding costs for each product.

What do the variables D, S, and H represent?

D = annual demand (units), S = cost per order (dollars), H = holding cost per unit (dollars).

How to calculate holding cost per unit?

Holding cost per unit is calculated considering storage, insurance, and depreciation. Average costs per year are often used.

Calculate EOQ for D=5000, S=50, H=2.

EOQ = $$\text{sqrt} \left( \\frac{2 \times 5000 \times 50}{2} \right) = 500 \text{ units}$$.

What effect does increasing holding cost (H) have on EOQ?

Increasing holding cost decreases EOQ, leading to fewer units being ordered at a time.

Cost comparison: EOQ vs. larger order sizes?

EOQ minimizes costs; larger order sizes increase holding costs and potential stock obsolescence.

Fill in the blank: EOQ helps in minimizing _____ costs.

EOQ helps in minimizing total inventory costs.

What happens to EOQ if demand (D) increases?

If demand increases, EOQ also increases, leading to larger order quantities.

True or False: The EOQ model assumes constant demand.

True. The EOQ model assumes steady demand throughout the year.

Define the term 'ordering cost'.

Ordering cost includes all expenses incurred with placing an order, such as shipping and handling.

Calculate EOQ if D=12000, S=100, H=4.

EOQ = $$\text{sqrt} \left( \\frac{2 \times 12000 \times 100}{4} \right) = 346.41 \text{ units}$$.

How does a decrease in S affect EOQ?

A decrease in S increases EOQ, resulting in larger order quantities to minimize costs.

Identify the relationship between EOQ and carrying costs.

Higher EOQ increases carrying costs due to more inventory being held on hand.

What is the total cost formula in EOQ?

Total cost = Ordering costs + Holding costs. Use EOQ to minimize this total.

What are carrying costs?

Carrying costs are expenses related to holding inventory. They include: - Storage costs - Insurance - Depreciation - Opportunity costs

True or False: Ordering costs increase as order quantity increases.

False. Ordering costs decrease as order quantity increases because fewer orders are placed.

Fill in the blank: The total cost in EOQ includes __________ and carrying costs.

ordering costs

How are ordering costs calculated?

Ordering costs are calculated by multiplying the number of orders per year by the cost per order. Formula: $\displaystyle OC = \frac{D}{Q} imes S$, where $\displaystyle D$ = demand, $\displaystyle Q$ = order quantity, $\displaystyle S$ = cost per order.

What are stockout costs?

Stockout costs are penalties for running out of stock. They can include lost sales, customer dissatisfaction, and potential long-term loss of customers.

Cause → Effect: Increasing order size affects carrying costs how?

Increasing order size raises carrying costs due to more inventory being held.

Compare carrying costs and ordering costs.

Carrying costs are related to holding inventory, while ordering costs are associated with placing orders. - Carrying: storage, insurance - Ordering: order processing, shipping

What influences carrying costs?

Carrying costs are influenced by: - Inventory level - Storage space - Interest rates - Insurance premiums

True or False: An increase in demand always leads to higher total costs.

False. An increase in demand can lead to lower total costs if managed well through better ordering and carrying strategies.

Give an example of a carrying cost.

An example of a carrying cost is the monthly rent for warehouse space used to store inventory.

What is the formula for total cost in EOQ?

The total cost formula combines carrying and ordering costs: $\displaystyle TC = OC + CC$, where $\displaystyle OC$ = ordering costs and $\displaystyle CC$ = carrying costs.

What happens when carrying cost exceeds ordering cost?

If carrying costs exceed ordering costs, it may indicate that inventory levels are too high, leading to inefficiencies.

How is the optimal order quantity derived?

The optimal order quantity minimizes total costs by balancing ordering and carrying costs. Derived from the EOQ formula.

What is a direct consequence of high ordering costs?

High ordering costs can lead to larger order sizes to minimize frequency of orders.

What is the relationship between order frequency and total costs?

Increased order frequency raises total costs due to higher ordering costs, while lower frequency may increase carrying costs.

Fill in the blank: The primary goal of the EOQ model is to minimize __________.

total inventory costs.

What is a real-world application of EOQ?

Retail inventory management to minimize costs.

True or False: EOQ is useful for all types of inventory.

False: EOQ works best for steady demand and consistent lead times.

Fill in the blank: EOQ helps balance ______ and carrying costs.

ordering

How does EOQ assist manufacturers?

Optimizes order sizes, reducing inventory holding costs.

Limitations of EOQ include:

- Assumes constant demand - Ignores stockouts - No bulk discounts

What impacts EOQ accuracy?

Fluctuating demand, varied lead times.

True or False: EOQ is effective for seasonal products.

False: Seasonal demand complicates EOQ calculations.

Real-world application example of EOQ?

A bookstore ordering bestsellers based on past sales data.

Cause → Effect: High carrying costs lead to ______.

Lower profitability.

What is a limitation of EOQ in perishable goods?

Risk of spoilage if inventory is too high.

Comparison: EOQ vs. Just-In-Time (JIT)

EOQ focuses on cost minimization; JIT focuses on reducing inventory levels.

What factors can disrupt the EOQ model?

Supply chain disruptions, price fluctuations.

True or False: EOQ considers variable pricing models.

False: EOQ assumes constant purchasing prices.

Example of a company using EOQ?

A grocery store managing staple items like rice and pasta.

Fill in the blank: EOQ calculations assume ______ demand.

constant

What does EOQ not account for?

Qualitative factors affecting demand.