Essential Principles of Operations, Inventory, and Cost Management
This document clarifies fundamental concepts in operations, inventory, and cost management, crucial for optimizing business processes and financial performance.
1. Understanding Product Cost Categories
What are the 5 categories of costs associated with products for sale?
The five categories are:
- Purchasing Costs: Costs of items acquired from suppliers.
- Ordering Costs: Costs associated with preparing a purchase order and receiving merchandise.
- Maintenance Costs: Costs incurred to hold and maintain inventory.
- Stockout Costs: Arise when a customer demands a product unit that is not available.
- Quality Costs: (i, p, fi, fe) – typically referring to prevention, appraisal, internal failure, and external failure costs.
2. The Economic Order Quantity (EOQ) Model Explained
How is the Economic Order Quantity (EOQ) model used by administrators?
The EOQ model calculates the optimum quantity to be ordered to balance ordering costs with maintenance costs. Generally, the larger the number of orders, the higher the annual maintenance costs and lower the annual cost for ordering. The EOQ model includes costs recorded in the financial accounting system, as well as opportunity costs that are not recorded in the systems.
3. Aligning EOQ with Performance Evaluation
How do companies reduce the conflict between the EOQ decision model and models used for evaluating performance?
The opportunity cost invested in inventory is a key input to the EOQ decision model. Many companies include these opportunity costs when they evaluate their managers so the EOQ model aligns with the performance assessment model.
4. Supply Chain Fundamentals and Benefits
What is a supply chain, and what are the benefits of analyzing the supply chain?
The supply chain describes the flow of goods, services, and information from the initial sources of materials and services to the delivery of consumer products, regardless of whether these activities occur within the same organization or elsewhere. Analyzing the supply chain allows companies to coordinate their activities and reduce inventories throughout the entire supply chain.
5. MRP vs. Just-in-Time (JIT) Production Systems
How do Material Requirements Planning (MRP) and Just-in-Time (JIT) production systems differ?
MRP systems use a push approach that produces finished goods for inventory based on demand forecasts. In contrast, Just-in-Time (JIT) production systems use a demand-pull approach in which products are manufactured only to satisfy customer orders.
6. Key Characteristics of JIT Manufacturing
What are the characteristics of the JIT manufacturing productivity system?
The five key characteristics of JIT are:
- Organize production in manufacturing cells.
- Recruit and train skilled workers in various tasks.
- Emphasize Total Quality Management (TQM).
- Reduce manufacturing and assembly time.
- Develop solid relations with suppliers.
7. Understanding Backward Flow Costing
What is backward flow costing?
Backward flow costing involves recording some journal entries related to the cycle that runs from the purchase of direct materials to the sale of finished products, but in a delayed or simplified manner.
8. Backward Flow Costing Simplifies Inventory
How does backward flow costing simplify inventory costing?
Traditional inventory costing systems use sequential tracking, where the recording of journal entries occurs in the same order as transactions and purchases in progressive production. Most backward flow costing systems do not record journal entries for the production stage in the process. Some backward flow costing systems may even simplify entries recorded for the purchase of direct materials or for finished goods.