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What is Kanban

Also known as: kanban board, kanban method

Definition

Kanban is a way to manage work on a board of columns with a limit on how many items can be in progress at once. New work starts only when a slot frees up.

Why it matters

It is easy to start work and hard to finish it.

Common mistakes

Running a board without WIP limits, which turns it into a list of tasks drawn in columns.

Related terms

Worked exampleIllustration

The bakery's custom orders board, on a Monday

A family bakery runs its custom cake orders on a board with four columns.

  1. Columns

    Ordered, Baking with a limit of 3, Decorating with a limit of 2, and Ready for pickup.

  2. Monday

    6 cakes wait in Ordered, 3 are in Baking and 2 in Decorating, so both limits are full.

  3. Pull

    A fourth cake cannot enter Baking until one moves on, so the baker finishes a cake before starting another.

  4. Bottleneck

    Baked cakes pile up in front of Decorating, which shows where the bottleneck is.

  5. One card

    The birthday cake ordered on Sunday is one of the cards in Ordered, waiting for a free slot in Baking.

The limit is the method. Without it the board is a to do list with columns.

Illustration

Starting more does not finish more

Monday, 08:00

Ordered

 

Birthday

Baking

Limit 3

Decorating

Limit 2

Ready for pickup

 

Limit 3: 5 cakes ready by 18:00, and baked cakes spent 11 cake hours in the day waiting for the decorator.

The bakery's Monday board. The oven bakes every cake in Baking at once, one decorator decorates one cake at a time, and a baked cake keeps its Baking slot until Decorating pulls it. Move the hour to run the day, and the limit on Baking to see what it changes.

Definition

Kanban, as used for office, software and service work, is a method for managing the flow of work: every item is a card on a board, the columns are the stages of the work, and each stage has a limit on how many items it may hold at once, the WIP limit (work in progress). New work is pulled in only when an item leaves, not pushed in when someone has an idea. Each column has an explicit policy that says when an item is done there. The Kanban Guide names four flow measures: WIP, "the number of work items started but not finished", throughput, work item age and cycle time. The word comes from the Toyota Production System, where a kanban is a card that signals when to make or replenish parts in a pull system. David J. Anderson's Kanban Method applied the idea to knowledge work.

Why it matters

A WIP limit forces the choice: finish something before you start something new, often put as stop starting, start finishing. Limits also expose the bottleneck, because cards pile up in front of the stage that cannot keep up, so you see where help is needed instead of guessing. And the board is where lead time and cycle time are measured: each card carries the date it entered and the date it left.

Directly related: Lead Time, Cycle Time, Bottleneck.

Improvement tips

  • Set a WIP limit on every working column, start low, and adjust it after a few weeks.
  • Write each column's policy on the board: what has to be true for a card to move on.
  • Mark blocked cards so everyone sees them, and clear blockers before pulling new work.
  • Record the start and finish date on each card, so lead time and cycle time come for free.

Common mistakes

  • Letting the board drift from reality, so decisions rest on stale cards.
  • Leaving blocked cards on the board for days without anyone asking why.
  • Adding people to every column instead of helping the one where cards pile up.
Agile vs Scrum vs Kanban

Related terms

Project ManagementIntermediate

Lead Time

Lead time is the full time from a customer's request to delivery, waiting included. It is the wait the customer feels, not only the time spent working.

Project ManagementIntermediate

Cycle Time

Cycle time is the time from when work on an item starts to when it is finished, waits after the start included. The queue before the start is not part of it.

OperationsBeginner

Bottleneck

A bottleneck is the slowest step in a process, the one that sets how much the whole business can deliver. In a small business, it is often the owner.

Project ManagementBeginner

Agile

Agile is a way of working in short cycles: deliver a working result, learn from the people using it and adjust the plan. Scrum and Kanban are two ways to do it.

Project ManagementBeginner

Scrum

Scrum is a lightweight framework in which a small team works in sprints of one month or less, meets for 15 minutes a day and shows a working result each sprint.

OperationsIntermediate

Throughput

Throughput is the rate at which a business delivers finished work to customers, like cakes sold per day. The bottleneck sets it, not how busy the team is.

Quick check

What is the main reason to set a WIP limit on a Kanban column?

Choose an answer

Frequently asked questions

Do I need to understand Kanban before starting my business?
The basics take minutes: columns for the stages of your work, cards for the jobs, and a limit on how many are in progress. It helps early, when a long launch list makes it tempting to start everything at once.
When does a new business first start using Kanban?
As soon as work repeats in stages, such as orders, client requests or content. A board with three or four columns is enough to start.
Can a solo founder benefit from Kanban?
Yes. A limit of two or three jobs in progress keeps one person finishing rather than juggling, and the board shows at a glance what is waiting on someone else.
Where does Kanban come from?
The word comes from the Toyota Production System, where a kanban card signals that parts should be made or replenished. David J. Anderson's Kanban Method later applied the idea of limiting work in progress to office, software and service work.
Why does Kanban matter for a business already running?
When a team works on too many things at once, everything moves slowly. A WIP limit makes the team finish before starting, and the board shows the stage where work piles up.
What goes wrong when a business uses Kanban without WIP limits?
Nothing changes except the look. Cards keep being started, they pile up in the middle columns, and the board becomes a colourful to do list.
How do I start using Kanban without changing our tools?
Draw three or four columns on a whiteboard or in a spreadsheet, move your current jobs onto it, and set a limit on the working column. Review the limit after two weeks.
How do I find a bottleneck with Kanban?
Look for the column where cards pile up in front of a full stage. That stage is the bottleneck, and helping it moves more work than speeding up any other column.
What does Kanban mean in plain words?
A board that shows every job and the stage it is in, with a rule that only so many jobs may be in progress at once.
Is Kanban complicated or risky for a beginner?
No. You start with your current process as it is and change one thing: the limit. Nothing is reorganised on day one.
Do I need special software to use Kanban?
No. Sticky notes on a wall or a free online board are enough to start.
What does WIP limit mean and why should I care?
WIP means work in progress, items started but not finished. A WIP limit is the most items a column may hold at once. It makes you finish before you start, so jobs get done sooner.

Sources: The Kanban Guide, kanbanguides.org, May 2025, Kanban University, The Official Guide to The Kanban Method, Lean Enterprise Institute, Lean Lexicon

Last reviewed: 2026-09-24

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