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Changeover Time
Time required to switch a machine or process from producing one product to another.
Importance: Reducing changeover time increases flexibility, reduces downtime, and minimizes inventory.
Kanban
A scheduling system originating from Toyota's lean manufacturing process that uses visual signals (like cards, bins, or digital boards) to control the flow of materials and work through production or a supply chain.
Purpose of Kanban
- Implement a Pull System: Ensures production aligns with actual customer demand rather than speculative forecasts.
- Prevents overproduction, minimizes waste, and balances workload.
Key Features of Kanban
- Visual Signals: Cards, boards, or bins signal what, when, and how much to produce or move.
- Limits on WIP (Work in Progress): Controls the amount of work allowed at any stage to prevent bottlenecks.
- Continuous Improvement: Kanban boards help teams visualize inefficiencies and make process adjustments.
How Kanban works
- Consumption: When materials or parts are consumed, a Kanban card is sent as a signal to replenish.
- Replenishment or Production: The card triggers production or movement of the specified quantity.
- Delivery: The replenished items are delivered just in time to prevent delays or overstocking.
Benefits of Kanban
- Reduced Inventory: Produces only what is needed when it is needed.
- Improved Communication: Clear visual signals reduce misunderstandings and delays.
- Enhanced Flexibility: Adjusts quickly to changes in demand or process flow.
- Increased Productivity: Minimizes overproduction and downtime.
Kaizen
continuous improvement involving all employees.
- Focus on small, incremental changes.
- Encourage teamwork and innovation.
- Example: Daily team meetings to identify areas for process improvement.
Lean
Focuses on delivering maximum value with minimal resources.
Waste
Any activity that doesn't add value (e.g., overproduction, waiting).
Muda
Waste (e.g., defects, overproduction).
Mura
Unevenness in production causing inefficiencies.
Muri
Overburdening resources or people, leading to inefficiency, errors, or breakdowns.
Poka-yoke
Definition: Error-proofing techniques to prevent mistakes.
Example: USB connectors designed to fit only one way.
Takt Time
The rate at which products must be produced to meet customer demand.
Example: If 8 hours are available and 120 units are needed, Takt Time = 4 minutes/unit.

Control Chart Rules
Definition: Graphical tools to monitor process stability.
Rules: Points outside control limits.
Trends or patterns indicating non-random variation.
ISO (International Standards Organization)
- Ensures standardized quality management (e.g., ISO 9001).
- Improves consistency, customer satisfaction, and compliance.
Six-Sigma
A methodology to reduce defects and variability in processes.
Goal: Achieve fewer than 3.4 defects per million opportunities.
Tools: DMAIC (Define, Measure, Analyze, Improve, Control).
Center of Gravity Models
Definition: Mathematical approach to find the optimal location to minimize transportation costs.
Application: Facility placement for warehouses or distribution centers.
Coordination
Definition: Align geographically dispersed operations for seamless performance.
Example: Boeing sharing R&D insights across global teams.
Configuration
Definition: Deciding where to locate activities in the supply chain.
Factors: Resource access, scale economies, and proximity to markets.
Market Chasers
Locate facilities near customer populations to improve delivery speed and customer service.
Resource Chasers
Locate facilities near raw material sources or other critical resources to lower costs.
Demand Patterns Types
Trend, seasonal, cyclical, and random patterns.
Forecast Horizon
The time frame a forecast covers (short-term, medium-term, long-term).
Forecast Types
Qualitative: Expert judgment (e.g., Delphi method).
Quantitative: Data-driven techniques (e.g., moving averages, regression).
Procurement
Strategic acquisition of goods/services.
Purchasing
Transactional buying process.
Sourcing
Selecting and evaluating suppliers.
Strategic Sourcing Matrix - Categorizes purchases - Routine
Low value, low complexity.
Strategic Sourcing Matrix - Categorizes purchases - Leverage
High value, low complexity.
Strategic Sourcing Matrix - Categorizes purchases - Bottleneck
Low value, high complexity.
Strategic Sourcing Matrix - Categorizes purchases - Critical
High value, high complexity.
Aggregate Planning
Balances production, inventory, and workforce to meet demand.
Common Mistakes in ERP Implementation
Lack of user training, poor planning, and failure to redesign business processes.
Level and Chase Strategies
Level: Steady production, use inventory to meet peaks.
Chase: Adjust production to match demand fluctuations.
Integrated Planning
Synchronizes planning across functions like production and inventory.
EOQ (Economic Order Quantity)
Optimal order size minimizing total inventory costs.

Pareto Principle
80% of inventory value comes from 20% of items.
Backwards Scheduling
Start with the due date and work backward to plan tasks.
Bill of Materials (BOM)
Detailed list of materials and components required for production.
Dependent vs. Independent Demand
Dependent: Driven by production of another item (e.g., car parts).
Independent: Customer-driven demand for finished goods.
Fixed Order Quantity
A fixed amount ordered each time inventory is replenished.
Inventory Records
Tracks levels, orders, and usage of inventory.
Lot-for-Lot
Orders only the exact quantity needed.
Master Production Schedule (MPS)
Specifies what products to produce and when.
Periodic Order Quantity
Orders placed at set intervals, with varying quantities.
Cow to Customer
Highlights the disrupted beef supply chain during COVID-19, from ranchers to restaurants, showcasing vulnerabilities and adaptations.
The Quality Dimensions of Service - Tangibles
Physical appearance of facilities.
The Quality Dimensions of Service - Reliability
Consistency in service performance.
The Quality Dimensions of Service - Responsiveness
Willingness to help customers.
The Quality Dimensions of Service - Assurance
Knowledge and courtesy of employees.
The Quality Dimensions of Service - Empathy
Personalized care.
The Square Root Rule
Increasing the number of locations increases safety stock, but at a rate proportional to the square root of the number of locations.