DevOps’ ultimate aim is to create efficiencies in the software delivery process. But, it doesn’t always work out that way. Sometimes DevOps initiatives lead to mistakes—something we lovingly call a “DevOoops.” CloudBees recently polled some colleagues and came up with five examples of a DevOoops in action. The following is a discussion submitted by product marketer Juni Mukherjee about poorly defined key performance indicators (KPIs).
Scenario:
How we define KPIs can change the game. For example, one quality engineering team defined the number of tests executed per sprint as a success metric. Humans are driven by incentives and the natural tendency of the team was to add more and more tests without even considering archival of outdated ones. Think of this: We could have a larger impact with fewer tests and, more importantly, fewer tests lower the test cycle time. So, instead of sheer quantity, we should focus on the coverage and effectiveness of tests. Similarly, a release engineering team defined the number of releases per sprint as a success metric. The number of releases reflects on velocity for sure. However, releases move bits from point A to point B without assessing the value added to business. It is critical to tie a business KPI (such as the number of new customers acquired, percentage of revenue increase, etc.) to velocity, such that we know we are investing in valuable speed and not suicidal speed.
Management consultant Peter Drucker boiled his whole philosophy down to the following few words: “If you can’t measure it, you can’t improve it.”
Successful DevOps leaders take this saying to heart. To understand where they’re going, how to get there and ultimately how far they’ve come, these leaders know how critical it is to establish KPIs that fit the overall objectives of their DevOps transformations. KPIs provide appropriate and continuous insight—and they plot a route to help you get to your destination.
The big question is: Are you measuring the right things? If not, you could be spinning their wheels.
To avoid this “DevOoops” scenario, you need to start by establishing KPIs that not only align to your objectives but can also be established so that they create a continuous feedback loop. As the project progresses, as you mature and learn more, you will likely need to maintain, monitor and possibly adjust and update these KPIs.
What would be an appropriate test coverage goal? Teams all want to improve quality. But by how much? Seventy percent? Eighty percent? One hundred percent? This is an example of a KPI that needs to be considered in the context of your application as well as measured against your real objective.
You can have 70 percent test or code coverage, but if that’s just treated as a measure to test as much code as possible, you may miss the mark. If you are covering 70 percent of the wrong code and the 30 percent that’s missing is critical code, you’ve put in significant effort with the risk of little or no return on quality level.
In terms of your goals, increasing and monitoring test coverage may be an indicator of quality, but it may not measure your actual quality of work. In this case you want a KPI that’s measuring the outcome rather than the activity. Look at what is severity 1 and severity 2 defect rate in production. You can see code coverage get to 90 percent, but if you’re not seeing a decrease in severity 2 defects, you won’t really be seeing an improvement in our code coverage metric.
Takeaways:
- You’re not implementing DevOps just to say you’re doing it; you need to develop goals and objectives for your initiative and align to them.
- Once goals are defined, you need to align KPIs and success metrics to those objectives. Properly defining these success metrics and KPIs will dictate what gets prioritized when building pipelines.
