Short Answer
Honestly, it doesn’t matters. If it helps an organization create value for its customers in a way that allows employees to experience freedom while solving challenging problems, it doesn’t matter what label the method carries! But, that would be too short a response.
Longer Answer
One way to decide if something should wear the label “agile” is to look at how it reflects the values stated in the Agile Manifesto. Of the Agile Manifesto statements, this is how Kanban values the “items on the left” over those on the right.
Individuals and Interactions over Processes and Tools
The visibility that Kanban provides to teams is a key contributor to facilitating interaction amongst individuals. The kanban board gives visibility to impediments that individuals are encountering makes resolving the impediment of prime importance.
Unlike Scrum, Kanban does not explicitly encourage generalization of skill sets. While Kanban does not force you to have a role for every queue, it is often easy to start by mapping the roles to queues and then inspect the bottlenecks and address those by helping the team develop more generalized skills.
Kanban is not a tool or a process that supersedes the importance of the individuals and their interactions. Yes, Kanban provides a lot of metrics that can be used to inform planning. However, the metrics are to facilitate interaction among team members, between team and stakeholders, and between team and customers.
Working Software over Comprehensive Documentation
When using Kanban to produce software, there are specific characteristics of Kanban that allow you to value working software over comprehensive documentation; small batches, WIP limits, measuring and managing flow. Perhaps your workflow will have a step or steps related to creating documentation.
Kanban does not prescribe working software, other than through mapping your value stream. If the last step in the value stream is working software, you can use Kanban as a tool to make sure you do that.
Customer Collaboration over Contract Negotiation
Kanban encourages customer collaboration through the prioritization of the backlog. Prioritization of the backlog is an ongoing process. Agile Kanban practitioners often use user stories or minimal marketable features (MMF). Use of either of these approaches supports customer collaboration in creating those items. The person who provides the detail on the stories or MMF is also available to the team to respond to questions.
As in Agile, daily standups are also present in Kanban. Unlike Agile, only people with issues speak in the daily standup. The standup meeting is an opportunity to speak up, whereas in Agile the traditional “three questions” are often present. This gives the team an opportunity to elevate issues to the Product Management representative’s attention, allowing them to be a partner in the process.
Silver Bullet Policy (see slide 20 for a brief overview) allows the customer to swap out an extremely high priority item for the current work in progress. There needs to be a swap so that WIP limits are not exceeded. Silver Bullet Policy may never be used, but can give the business the feeling that if there is an emergency, they can use this policy.
Responding to Change over Following a Plan
Agile teams often plan on a regular cadence. In Kanban, planning events can be triggered on an event. For example, your team may have a rule as follows: When the backlog backlog has dwindled to ten stories, a planning event will be held.
Unlike Scrum or XP, where the teams try to identify a piece of stability to work on for a period of time, Kanban allows the team to re-prioritize the backlog at any time and take something new off the backlog. This allows the team to respond to change sooner than if they were locked into a set sprint duration.
Summary
While Agile is primarily focused on software, Kanban is more focused on developing a lean organization . In fact, the business-oriented language that surrounds Kanban may make it an easier Agile model to embrace than Scrum.
While an organization or team can claim to be using Kanban and use it in non-agile ways, that will not be the case when done well. If the team and management use visualization, set WIP limits, and iterate on the value stream, Kanban is an excellent option for Agile teams.
Find More Information
There are lots of excellent resources on Kanban. My favorite reference is a book called Kanban – Successful Evolutionary Change for Your Technology Business. Thank you, Eric Landes, for loaning me your copy for a while. For further reading, check out the InfoQ version of the Kanban and Scrum Book.
A special thank you to Eric and Susan for co-authoring this blog.