Kanban Backlog

Let’s start this article by first saying that according to Lean, maintaining an ordered list of ideas (backlog) is a waste. Why is it a waste? Well, simply because having an endless pool of ideas, always trying to refine and prioritize them takes time. What if they never get implemented? The answer is clear: wasted time.

However, when working on a project, product or service, we still need to have a way to capture our ideas, including customer feedback. Otherwise, we risk accumulating high levels of disorganization and misunderstanding of what the real customer requirements are. Without a doubt, that would keep us very far away from the path to agility.

That’s why to eliminate chaos, we collect and plan our ideas with the help of the Kanban backlog. It helps us reduce the uncertainty of the work process and provide value to customers all the time.

What is the Purpose of the Kanban Backlog?

By definition, a project or product backlog is a visual representation of items that we may or may not deliver. On a Kanban board, the backlog “lives” on the leftmost part before the “To Do” stage (column).

Once we pull work from the Backlog to the “To Do” column, we are signaling that all the details about it are clear and we will get it done successfully (making sure it’s of high quality). Then, whenever the item goes into the “In progress” stage, we are committed to finishing it with a given SLA (Service Level Agreement).

With that being said, we need to point out that the purpose of the Kanban backlog is not just to list out our ideas or customer feedback. Instead, our intention should be to make them more visible and actionable so we can eventually bring them to life.

Backlog Prioritization

Inside the backlog, everything needs to be kept in a semantic order which should be achieved with as minimal effort as possible. A way to do that is by creating different levels of priority.

In case we need to collect a large pool of ideas, we can create a separate visual board to serve as our backlog. Notice that this is not a Kanban board because there is no flow of work there. We just use it as a way to better visualize and prioritize rough ideas as well as customer feedback.

Once we have our board in place, we can separate it vertically on columns (representing type of work) and horizontally on swimlanes where we will define our different levels of priority. In this case: High, Medium and Low. To determine the order of ideas, we should place higher those items that are more in demand, require bigger effort and yield higher value to our customers.

backlog prioritization

For more clarity, I am going to provide a brief example of a “voting system” that our product development team uses at Kanbanize. Their backlog of rough ideas and customer feedback looks exactly like the one that I described above.

So, whenever they receive a customer request for enhancement on our product, a new card is created on the board. If such a card exists, which means a customer has already made that request, they simply add it as a subtask. Note: The image below is a very rough example of how this can happen in reality.

backlog board

Those cards with more subtasks, go higher in priority for execution because they are clearly in higher demand and value to our customers. To reduce the wasted time of manually arranging the backlog, we have an automation rule set up which counts the subtasks. Whenever they reach a specific number, the card automatically moves to the lane that represents a higher priority.

Prioritizing using Cost of Delay (CoD)

Another way to prioritize items in the backlog is to use Cost of Delay (CoD).

By definition, that represents the cost that we would accumulate if we delayed a particular job by a certain measure of time (days, weeks, months). Just like the Lean expert Don Reinersten suggests in his book “The Principles of Product Development Flow”: “If you only quantify one thing, quantify the cost of delay”.

To do that on a basic level, we need to take into account the expected monetary value of a deliverable as well as the time criticality behind it (a fixed deadline for example). Then, we simply divide the former by the latter to understand which option yields a higher “CD3” (Cost of Delay divided by Duration).

cost of delay timetable

Having that information in mind, we should always prioritize those deliverables with a higher cost of delay above the ones with lower CoD. In case the cost of delay of two deliverables is the same, then we should put higher priority on the one that would take us a shorter amount of time to complete.

In order to learn how to make the right calculations in detail and decide what to prioritize, check out our dedicated article on Cost of Delay (CoD).

Upstream Kanban for Backlog Refinement

Once an idea becomes important enough for realization, we need to gather more knowledge about it and decide whether to implement it. That’s why in Kanban, we have an Upstream (Discovery) as well as Downstream (Delivery) process. In reality, the Backlog is the leftmost part of the Discovery process.

kanban process system

The purpose of Upstream Kanban is to refine our backlog ideas. There, we use set-based decision making (known as set based concurrent engineering which first came from Toyota) to evaluate an option for the development of a product or service. This means that we can either discard that option or decide that it’s viable and will eventually produce value to our customers.

If the latter is the case, then we pull it to Delivery Kanban where the actual work happens. The benefit of the Discovery process is that it reduces the likelihood of abandoning work (and generating waste as a result of it) once we have already made a commitment to deliver it to our end-customers.

Upstream Kanban at Kanbanize

Let’s give a short example of an Upstream Kanban implementation with the development of this article. To complete it, we have a dedicated workflow called Content Development on our Marketing board where on the leftmost side, we keep a pool of ideas what content we should produce.

When we pull an idea, we go through an Upstream process (consisting of Conceptualization and Review steps) to gather more information about the content and determine if it’s actually relevant to our target audience. If not, we can adapt it in a way it provides value to our customers or completely discard it.

upstream kanban example

Note how I haven’t mentioned anything about delivery commitment yet? Exactly. You can think of Upstream Kanban as a commitment to only gather knowledge. We are first discovering what it would take us to prepare a valuable content before committing to delivering it to our website. This process maintains our Kanban backlog of refined ideas, reduces the uncertainty of what we are going to deliver and helps us create value with our work every single time.

Using the Backlog at Kanbanize as a Planning Tool

I already gave a few examples of how our product development team prioritizes ideas and customer feedback as well as how our Marketing team uses Upstream Kanban for refinement. However, we also actively use our Kanban backlogs for planning on the team and initiative levels.

For example, on the Marketing board we have a workflow called Cards Workflow where our main tasks flow through. As you can imagine, we have a lot of ideas for different campaigns that we can execute right away. However, some of them are related to projects that we have planned for the last quarter of 2019 while others for the first quarter of 2020.

It’s clear that the former should be executed first. That’s why to better plan what we need to do until the end of the year, while not losing track of the work we need to do later, we divide our backlog on Near Future and Distant Future.

near and distant future visualized on a backlog

The same idea works on the portfolio level. Our C-level executives plan the Strategic goals of the company on a Hoshin board. There, they divide their Kanban backlog on initiatives to be executed in the quarters of this year as well as more distant goals that we are going to pursue in 2020 and 2021 for example. This keeps us aligned with the short and long-term company vision which bridges the gap between senior and team-level executives.

backlog on a hoshin board for planning initiatives

At the end of the day…

The Kanban backlog is a really effective tool for managing ideas and customer feedback. Deciding what to work on next as well as refining our ideas reduces ambiguity and increases the likelihood of providing value to our customers.

So, how do you use your Kanban backlog? Do you implement Upstream Kanban in your processes? Let us know in the comments below.

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