What is Kanban?

Definition of Kanban

Kanban is a work management method that focuses on visualizing processes and optimizing the flow of tasks. It originated from a Japanese production system developed by Taiichi Ohno in the 1950s at Toyota. The name “Kanban” comes from Japanese words meaning “board” or “sign,” referring to the cards used to track work progress.

Kanban is used across a wide range of fields, from manufacturing to project management, and helps teams manage tasks effectively through visualization and workflow control. Unlike other agile methods, Kanban does not prescribe fixed roles, ceremonies, or timeboxes, but instead relies on evolutionary change of existing processes.

History and Development of the Kanban Method

The history of Kanban can be divided into two key phases: its origins in manufacturing and its modern adaptation for knowledge work.

Origins at Toyota

Kanban was developed in the 1950s as part of Toyota’s Lean production system. Taiichi Ohno was inspired by the replenishment system used in American supermarkets, where shelves are restocked only when inventory runs low. This pull principle was transferred to manufacturing: instead of producing materials in advance, only what was actually demanded was produced. Physical Kanban cards served as signals to trigger replenishment, thereby eliminating overproduction and waste.

Adaptation for Knowledge Work

In 2004, David J. Anderson began applying Kanban principles to software development, first at Microsoft and later at Corbis. His 2010 book “Kanban: Successful Evolutionary Change for Your Technology Business” formalized the method for IT project management and significantly contributed to its popularity within Agile methodologies. Today, Kanban is one of the most widely used methods in software development, IT service management, and general knowledge work.

Core Principles of Kanban

The Kanban method is based on six core principles divided into two categories:

Change Management Principles

1. Start with what you do now: Kanban does not require a radical overhaul of existing processes. Instead, current workflows are visualized and incrementally improved.
2. Agree to pursue incremental, evolutionary change: Major disruptions create resistance. Kanban relies on small, continuous improvements.
3. Respect existing roles and responsibilities: No new roles are introduced. Existing structures are respected and organically evolved.

Service Delivery Principles

4. Focus on customer needs: All improvements are oriented toward delivering value to the customer.
5. Manage the work, not the workers: Kanban focuses on work flow, not on individual utilization.
6. Encourage leadership at every level: Everyone on the team should be able to suggest and implement improvements.

Core Practices of Kanban

Kanban defines six core practices that form the framework for implementation:

1. Visualize the Workflow

The central element is the Kanban board, which visually represents the entire work process. A simple board typically consists of three columns:

To Do	In Progress	Done
Task A	Task D	Task G
Task B	Task E	Task H
Task C		Task I

In practice, boards are often refined and contain additional columns such as “Analysis,” “Development,” “Review,” “Test,” and “Deployment” to more accurately reflect the actual workflow.

2. Limit Work in Progress (WIP)

Work-in-Progress limits (WIP limits) restrict the number of tasks that may simultaneously be in a given phase. This prevents overload and ensures that started work is completed before new tasks are begun. Typical WIP limits include:

• Development: Maximum 3 tasks per developer
• Review: Maximum 2 tasks in review
• Testing: Maximum 4 tasks in testing

3. Manage Flow

Active management of task flow aims to identify and eliminate bottlenecks. Key metrics include lead time, cycle time, and throughput.

4. Make Process Policies Explicit

All rules governing the work process are made transparent, such as when a task is considered “done” (Definition of Done) or how priorities are assigned.

5. Implement Feedback Loops

Regular meetings such as daily standups, service delivery reviews, and replenishment meetings serve continuous feedback and process improvement.

6. Improve Collaboratively (Kaizen)

Teams regularly reflect on their way of working and implement improvements based on data and experience.

Application of Kanban in the IT Industry

Kanban has proven to be a particularly effective method in the IT industry. Typical application areas include:

• Software development: Managing features, bug fixes, and technical debt throughout the development cycle
• IT service management: Handling incidents, service requests, and changes following ITIL principles
• DevOps: Coordinating development, testing, and deployment in CI/CD pipelines
• Product management: Prioritizing and managing product backlog items
• Support teams: Managing incoming tickets and escalations

ARDURA Consulting helps companies find experienced project managers and Agile coaches who can professionally implement Kanban and optimize existing processes. Through access to a broad network of IT specialists familiar with Kanban methods, ARDURA Consulting enables rapid staffing of key positions in agile teams.

Kanban vs. Scrum: A Comparison

Kanban and Scrum are two frequently compared agile methods that differ in several aspects:

Aspect	Kanban	Scrum
Iterations	Continuous flow	Fixed sprints (1-4 weeks)
Roles	No prescribed roles	Scrum Master, Product Owner, Team
Changes	Possible at any time	Only between sprints
WIP limits	Explicitly defined	Implicit through sprint capacity
Meetings	Flexible, as needed	Fixed ceremonies
Planning	Continuous	Sprint-based
Metrics	Lead time, throughput	Velocity, burndown

In practice, many teams use hybrid approaches that combine elements of both methods. This combination, known as “Scrumban,” uses sprints from Scrum with WIP limits from Kanban, for example.

Benefits of Implementing Kanban

Implementing Kanban brings numerous benefits:

• Increased process transparency: Everyone can see the current status of all tasks, improving communication and collaboration
• Better control over workflow: WIP limits prevent overload and promote completion of started tasks
• Reduction of waste: Identifying and eliminating bottlenecks removes unnecessary wait times
• Shorter lead times: Focusing on flow leads to faster delivery of results
• Faster adaptation to changes: Without fixed iteration cycles, priorities can be adjusted at any time
• Lower entry barrier: Kanban does not require a radical overhaul but can be introduced incrementally
• Data-driven decisions: Metrics such as lead time and throughput enable objective process optimization

Kanban Tools and Software

Numerous digital tools are available for implementing Kanban:

• Jira: Comprehensive project management tool with powerful Kanban board features, automations, and detailed reports
• Trello: Intuitive, card-based tool ideal for smaller teams and simpler workflows
• Azure DevOps: Microsoft solution with integrated Kanban boards, particularly suited for development teams
• Kanbanize: Specialized Kanban software with advanced features such as portfolio management and workflow automation
• Monday.com: Flexible work management tool with customizable Kanban views

The choice of the right tool depends on team size, workflow complexity, and integration requirements.

Challenges and Limitations of Kanban

Despite its many advantages, Kanban presents some challenges:

• Discipline with WIP limits: Teams tend to circumvent or ignore WIP limits, undermining the method’s benefits
• Lack of timeframes: Without fixed deadlines or sprints, it can be difficult to predict delivery dates
• Overwhelming boards: With too many tasks or overly complex workflows, the board can become cluttered
• Cultural change: Implementing Kanban requires a shift in work culture that may encounter resistance
• Measurement and analysis: Effective use of Kanban metrics requires an understanding of statistical concepts such as variability and flow efficiency
• Not suitable for all projects: Projects with very rigid schedules or regulatory requirements may benefit more from more structured methods

Success Factors for Kanban Adoption

For a successful Kanban implementation, the following factors should be considered:

1. Management support: Leadership must actively support and model the adoption
2. Gradual introduction: Start with a simple board and refine incrementally
3. Consistently enforce WIP limits: Discipline in maintaining agreed-upon limits
4. Regular retrospectives: Continuous reflection and process improvement
5. Use metrics: Measure and analyze lead time, cycle time, and throughput
6. Training and coaching: Invest in educating the team on Kanban principles

Real-World Examples of Kanban Success

Kanban has led to measurable success in many organizations worldwide:

• Toyota: The original application of Kanban in manufacturing contributed significantly to Toyota’s global success as an industry leader. The just-in-time production system drastically reduced inventory and waste.
• Microsoft: Multiple teams at Microsoft use Kanban to improve development efficiency. The Xbox division reported a 65 percent reduction in lead time after adopting Kanban.
• Spotify: The Swedish company uses Kanban elements within its squad model to balance team autonomy with organizational alignment.
• Financial services: Banks and insurance companies use Kanban to efficiently manage regulatory changes, IT projects, and service requests while improving customer satisfaction.

Summary

Kanban is a powerful and flexible work management method that has evolved from its origins in Japanese manufacturing to a universally applicable approach for knowledge work. Through workflow visualization, limiting work in progress, and continuous improvement, Kanban enables teams to work more efficiently and deliver better results.

Kanban’s strengths lie in its simplicity, flexibility, and evolutionary approach that does not require radical change. At the same time, successful implementation demands discipline, particularly in enforcing WIP limits, as well as an understanding of the underlying principles. For organizations looking to improve their work processes without completely overhauling existing structures, Kanban offers a proven and practice-tested approach that has demonstrated its value across industries.