Introducción a Kanban
Introduction to Kanban in Manufacturing
Overview of the Course
- Ana Cruz introduces the course focused on implementing Kanban in the manufacturing industry, outlining what participants will learn by the end of the module.
- The session aims to clarify what Kanban is, its functions, and various types currently used.
What is Kanban?
- Kanban is a Japanese term meaning "sign" or "signal," serving as a visual cue for production control.
- It acts as the "nervous system" of production systems, directing workflow similar to how a brain sends instructions throughout the body.
- Developed by Taiichi Ohno at Toyota, it was designed to actualize Toyota's Just-In-Time (JIT) philosophy by preventing overproduction.
Historical Context and Inspiration
- Ohno was inspired by American supermarkets' restocking methods, where shelves are replenished only after items are purchased.
- In essence, Kanban signals authorize production or movement of products based on demand rather than pushing inventory unnecessarily.
Kanban vs. Traditional Systems
Differences in Production Approaches
- A visual demonstration contrasts pull-based (Kanban) versus push-based systems; pushing leads to uneven inventories and excess stock.
- Pulling production ensures that inventory levels are balanced according to real-time needs.
Limitations of Kanban
- While effective, Kanban systems can still incur waste through excessive handling and processing; ideally, JIT would eliminate the need for any signaling system if customer demands could be met directly.
Functions of Kanban
Key Functions Explained
- Establishes limits within production systems akin to currency exchange—nothing moves without a signal from Kanban.
- Links material flow with information flow via cards or barcodes; this visibility helps identify abnormalities in inventory management.
Types of Kanban Systems
Common Types Discussed
- The classic two-card system uses one card for withdrawal from storage and another for signaling production needs back to assembly areas.
- Each card typically contains essential information such as part number, supplier name, quantity per container, shipping address, and more.
One Card System
- The single-card system may utilize alternative signals like empty containers or colored balls instead of traditional cards.
Understanding the Two-Drawer System in Inventory Management
Overview of the Two-Drawer System
- The two-drawer system is an alternative to traditional Kanban systems, utilizing standardized drawers or containers instead of cards.
- Each drawer contains an equal amount of products and has external labeling that indicates the product name, location, and quantity.
Functionality of the Two-Drawer System
- The first drawer's contents are consumed first; when it is empty, this signals the need to replenish stock from the second drawer.
- As items are used from the first drawer, the second drawer moves forward to take its place while new stock is prepared for both drawers.
Implementation Insights
- It’s crucial that replenishment occurs before all items in the second drawer are consumed to maintain inventory flow.