Cycle Time Scatterplot
The analytics in Kanbanize work per board. Click the Analytics icon on the top of each board to access the Analytics page.
The Analytics screen presents 5 categories: Cycle Time, Throughput, WIP, Flow, Forecasting, each available as a tab item on the page. Click on a tab button to view the charts for each of the respective metrics. The Scatter plot belongs to the Cycle time category.
Introduction to Scatter plot
The cycle time Scatterplot chart is a representation of how long it takes to get things done for individual items on your Kanban board. It visualizes the work items that have been completed on a given board (inside single or multiple workflows).
The chart's goal is not only to visualize the cycle time of tasks within a predetermined time frame.
It also aims to provide you with information about when the tasks from the workflow can be expected to be completed. The certainty of this is measured with percentiles.
How to set up the scatter plot?
From the left side of the panel, you can control which data you can see on the chart.
You can even add multiple workflows. In addition, you can apply other filters. For example, you may want to see only cards with high priority or cards that are of a certain type.
How does this chart work?
Across the "x" axis is a representation of time i.e. Completion date. You can see the dates across the button of the chart.
On the "y" axis is the Cycle time in days.
Every time when an item is completed, the system plots a dot on the vertical against the date of completion and where it goes depends on the cycle time. For example: on April 24th, an item was completed and it took 9 days to get done.
Note: A lot of the dots have small numbers inside. It means that the same number of items have been finished on that day. On hover, you can see the card IDs.
Besides showing you some visual representation of how work actually happens inside the board, this chart is important for one other reason.
It provides a probabilistic view that is activated via the percentiles (50%, 70%, 85%, 90%), which you control from the Chart Controls. Select all of them and they appear on the plot.
If you go all the way to the left following the horizontal lines, you will see a number for each of those lines.
- 95% -> 11 days
- 85% -> 6 days
- 70% -> 3 days
- 50% -> 2 days
What's that telling us?
Let's start with the 50% percentile. If you draw a horizontal line all across the chart, it will cut the dots in half - 50% of the dots will be below the line and 50% of them will be above the line.
The chart is telling us that 50 % of those items took 2 days or less to be completed. An alternative assumption might be that when an item enters our process, it has a 50% chance to be completed in 2 days or even less.
Imagine that you get a new request coming into this workflow. You naturally ask the question: How much time I need to get this done? Then you can instantly say that there is 95 % probability that your team will complete the work items within 11 days as long as its something like what you used to do here.
If it is not something radically new, then 11 days will be more than certain to be sufficient.
This chart allows you to forecast work on an individual work item level.
You can calculate the rest of the percentiles in the same way. These percentiles are important because they show us how much risk we are willing to take. If we are fine being wrong 50% of the time, we will say that 2 days are needed to complete the tasks.
If we prefer to stay on the safe side and be more accurate in our forecast, then we will interpret the process using the 85% or 95% percentile, which gives a higher level of certainty.
- Keep the dots as close to the "x" axis as possible, because that's how you are pretty fast to complete the work.
- Pay attention if the dots tend to grow on the right. If they do, it means that your cycle time is going up and you are getting slower over time.
- You can mark the cards that have been blocked using the "Blocked items" control to the right of the chart. You can toggle on and off which cards have been blocked. It is a good visual indicator, which gives you an idea of how many cards have been blocked.