Please review all three Articles, and provide a general review of the students response to the article. Three Articles: 100 - 150 words per article.
Article One
Inventory control is essential for optimizing operational efficiency, reducing costs, and meeting customer demand. The three primary inventory control models are the Economic Order Quantity (EOQ), Just-in-Time (JIT), and Materials Requirement Planning (MRP) models, each with its driving factor and application. The EOQ model focuses on minimizing total inventory costs, which include ordering and holding costs. The driving factor is cost efficiency. For example, Walmart uses a variation of EOQ to determine optimal order quantities that balance restocking frequency and storage costs across its distribution network (Heizer et al., 2020). The JIT model aims to reduce inventory holding costs by receiving goods only as they are needed in the production process. The driving factors are waste reduction and lean operations. Toyota is a classic example of JIT, as it pioneered the approach to streamline its manufacturing process and reduce excess inventory (Stevenson, 2021). The MRP model is driven by demand forecasting and plans inventory based on production schedules. It ensures that materials are available when needed for manufacturing. Apple uses MRP to manage its complex supply chain and production cycles for high-demand products like the iPhone (Jacobs & Chase, 2024).
References
Heizer, J., Render, B., & Munson, C. (2020). Operations management (13th ed.). Pearson. Jacobs, F. R., & Chase, R. B. (2024). Operations and supply chain management (17th ed.). McGraw-Hill Education. Stevenson, W. J. (2021). Operations management (14th ed.). McGraw-Hill Education.
Article Two
The three inventory control models are Economic Order Quantity (EOQ), Just-In-Time (JIT), and Material Requirements Planning (MRP). The driving factor in EOQ is to minimize total inventory costs by balancing ordering and holding costs, while JIT empasises usting just-in time manufacturing as a means of cutting waste and increasing efficiency. By figuring out what materials they need, in what amounts, and when they need them for production, manufacturers may better manage their inventory with MRP software. MRP software integrates information form production and procurement systems, such as assembly schedules, open purchases orders, anticipated sales, and current inventory levels, to arrive at this conclusion (Jenkins, 2025). Maintaining adequate inventory to prevent stock-outs and overstocks without increasing prices or compromising product quality and delivery dates is the major goal of MRP (Jenkins, 2025). By accurately predicting demand and coordinating with suppliers, manufacturers can optimize their production processes and minimize costs. This ultimately leads to increased efficiency and profitability for the company.
For example, Amazon utilizes MRP to analyze open purchase orders, anticipate sales, and current inventory levels to ensure they have enough products in stock to meet customer demand without having to much inventory. Similarly, Apple uses MRP to coordinate with suppliers and accurately predict demand for their latest iphone models, allowing them to optimize production processes and minimize costs while maintaining high product quality and delivery dates.
Walmart, which calculates the optimal order quantity for each product to minimize inventory costs while ensuring products are always in stock for customers, may use EOQ. Another example would be Toyota, which uses EOQ to determine the most cost-effective order quantity for parts and materials needed in their manufacturing process, helping streamline production and reduce overall costs. A hotel uses EOQ to determine the optimal quantity of linens, toiletries, and other supplies needed to ensure guest satisfaction while minimizing storage space and costs. By calculating the most efficient order quantities, hotels can maintain high standards of cleanliness and comfort for guests while maximizing profitability.
Jacobs, F. R., & Chase, R. B. (2024). Operations and supply chain management (17th ed.)
Jenkins, A. (2025, May 8). What is Material Requirements Planning (MRP)?. Oracle NetSuite. https://www.netsuite.com/portal/resource/articles/inventory-management/material-requirements-planning-mrp.shtml
The three main inventory control models are the Economic Order Quantity (EOQ) model, the Just-in-Time (JIT) model, and the ABC analysis model. Each has a different driving factor and is used by companies based on their operational needs.
- Economic Order Quantity (EOQ):
The EOQ model minimizes the total costs of ordering and holding inventory. The driving factor is finding the optimal order quantity that balances ordering costs with holding costs.
Example: Walmart uses EOQ principles to determine how much stock to order for its stores, ensuring shelves are stocked without over-investing in inventory (Heizer et al., 2020). - Just-in-Time (JIT):
The JIT model aims to reduce inventory holding costs by receiving goods only as they are needed in the production process. The driving factors are efficiency and waste reduction.
Example: Toyota is famous for its JIT system, where parts arrive at the assembly line exactly when needed, minimizing storage and excess inventory (Slack et al., 2022). - ABC Analysis:
ABC analysis categorizes inventory into three groups (A, B, and C) based on their value and importance. The driving factor is prioritization—focusing resources on the most valuable items.
Example: Amazon uses ABC analysis to manage its vast inventory, giving more attention to high-value or fast-moving products (A items) while automating or simplifying control for lower-value items (C items) (Kumar & Suresh, 2015).
References
Heizer, J., Render, B., & Munson, C. (2020). Operations Management (13th ed.). Pearson.
Slack, N., Brandon-Jones, A., & Burgess, N. (2022). Operations Management (10th ed.). Pearson.
Kumar, S. A., & Suresh, N. (2015). Production and Operations Management (2nd ed.). New Age International Publishers.