Pick to Light vs. E-Kanban: What's the Difference in Manufacturing?
Modern manufacturing relies on efficient material handling, accurate picking, and smooth communication between production lines and warehouses. As factories move toward smarter and more automated operations, technologies such as Pick to Light (PTL) and Electronic Kanban (E-Kanban) are becoming increasingly important.
Although both technologies help improve operational efficiency and reduce manual errors, they serve different purposes in manufacturing environments.
So, what is the difference between Pick-to-Light and E-Kanban? Can these two systems work together?
What are Pick to Light and E-Kanban?
What Is a Pick to Light System?
A Pick to Light system is a visual picking technology designed to guide operators to the correct storage locations and help them complete picking tasks accurately.
In a typical Pick to Light setup, electronic labels or light modules are installed on shelves, storage bins, or picking locations. When an order or picking task is released, the corresponding indicators illuminate to show operators where to pick items and how many units are required.
What Is an E-Kanban System?
E-Kanban, short for Electronic Kanban, is a digital version of the traditional Kanban management method. Traditional Kanban uses physical cards, labels, or containers to communicate material requirements and production information. It is commonly associated with Lean Manufacturing and Just-in-Time (JIT) production. E-Kanban replaces these manual communication methods with electronic signals and digital information management.
For example, consider an automotive assembly line where workers regularly consume screws and other components. When the quantity of a particular component reaches a predefined replenishment level, a replenishment request can be generated manually or automatically, depending on the system configuration.
The request is then transmitted to the responsible department or material management system, allowing warehouse staff to prepare and deliver the required materials.
What are the Key Differences Between Pick to Light and E-Kanban?
Although Pick to Light and E-Kanban are both used to improve manufacturing efficiency, their primary functions are different. Pick to Light focuses on guiding physical picking operations, while E-Kanban focuses on communicating material requirements and coordinating replenishment activities.
1. Purpose and Function
Pick to Light: The primary purpose is to guide workers to the correct picking locations and improve picking accuracy. It provides visual instructions through illuminated indicators and digital displays.
E-Kanban: The primary purpose is to communicate material requirements and coordinate replenishment activities. It helps ensure that production lines receive the necessary materials at the appropriate time.
2. Working Principles
Pick to Light: The system activates specific light indicators according to picking instructions. Workers follow the visual signals, pick the required quantities, and confirm task completion.
E-Kanban: The system generates or receives material replenishment signals based on inventory conditions, production requirements, or operator requests. These signals are transmitted to the relevant departments for processing.
3. Typical Applications
Pick to Light is commonly used in:
● Warehouse order picking
● E-commerce fulfillment
● Parts picking for assembly lines
● Pharmaceutical order picking
● Sorting and order consolidation
E-Kanban is commonly used in:
● Manufacturing material replenishment
● Assembly line material supply
● Lean production management
● Just-in-Time inventory management
● Production workflow coordination
| Comparison | Pick-to-Light | E-Kanban |
| Main Purpose | Visual picking guidance | Digital material management |
Core Function | Directs picking operations | Coordinates replenishment requests |
| Main Users | Warehouse operators and pickers | Production planners, warehouse staff, operators |
Key Objective | Improve picking speed and accuracy | Improve material supply and workflow visibility |
| Typical Environment | Warehouses and assembly areas | Manufacturing and production facilities |
Can Pick to Light and E-Kanban Work Together?
Yes. Pick to Light and E-Kanban are not competing technologies. In fact, they can complement each other in manufacturing environments. E-Kanban can manage material replenishment requests, while Pick to Light can provide visual guidance for the physical picking and delivery of materials.
How to Choose the Right Solution for Your Manufacturing Process?
Choosing between Pick to Light and E-Kanban depends on the specific challenges within your manufacturing operation. Here are several considerations:
Choose Pick to Light When:
● Operators frequently need to pick components from multiple storage locations.
● Picking accuracy is a major concern.
● Workers need clear visual instructions.
● Your operation involves repetitive picking, sorting, or assembly tasks.
Choose E-Kanban When:
● Your production lines require frequent material replenishment.
● Manual material requests create communication delays.
● You want to improve visibility into material supply processes.
● Your factory is implementing Lean Manufacturing or Just-in-Time practices.
Consider Combining Both When:
● Your warehouse and production lines need better coordination.
● Material replenishment involves multiple picking locations.
● You want to connect replenishment requests with actual picking operations.
● Your manufacturing process requires both material management and visual picking guidance.
Pick to Light focuses on guiding operators through picking and sorting activities, while E-Kanban helps manage material requirements and coordinate replenishment processes. Rather than viewing them as alternatives, manufacturers can consider how these technologies work together to improve material handling, streamline production workflows, and support smarter factory operations.
At LightPickSystems, we provide electronic Pick-to-Light labels and E-Kanban solutions designed for industrial applications. Our solutions feature electronic paper displays, LED indicators, and interactive buttons to support clear visual communication and efficient workflow management.
Whether you need a visual picking solution or an electronic Kanban system for your production environment, our team can work with you to explore a suitable configuration.
Contact us today to discuss your manufacturing requirements and explore a customized solution: Email: sale@sertag.com
