The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Organizations
Because our goal is to enable small teams of developers to independently develop, test, and deploy value to customers quickly and reliably, this is where we want our constraint to be. High performers, regardless of whether an engineer is in Development, QA, Ops, or Infosec, state that their goal is to help maximize developer productivity.
By doing this, Development and Operations may end up creating a shared work queue, instead of each silo using a different one (e.g., Development uses JIRA while Operations uses ServiceNow). A significant benefit of this is that when production incidents
DevOps and its resulting technical, architectural, and cultural practices represent a convergence of many philosophical and management movements (including): Lean, Theory of Constraints, Toyota production system, resilience engineering, learning organizations, safety culture, Human factors, high-trust management cultures, servant leadership, organizational change management, and Agile methods.
DevOps isnt about automation, just as astronomy isnt about telescopes.
Done poorly, Conways Law will prevent teams from working safely and independently; instead, they will be tightly-coupled together, all waiting on each other for work to be done, with even small changes creating potentially global, catastrophic consequences.
Every company is a technology company, regardless of what business they think theyre in. A bank is just an IT company with a banking license.§
For example, high performance with a functional-oriented and centralized Operations group is possible, as long as service teams get what they need from Operations reliably and quickly (ideally on demand) and vice-versa. Many
high performers use a disciplined approach to solving problems. This is in contrast to the more common practice of using rumor and hearsay, which can lead to the unfortunate metric of mean time until declared innocenthow quickly can we convince everyone else that we didnt cause the outage. When there is a culture of blame around outages and problems, groups may avoid documenting changes and displaying telemetry where everyone can see them to avoid being blamed for outages.
how we design our organization dictates how work is performed, and, therefore, the outcomes we achieve. Throughout
how we organize our teams has a powerful effect on the software we produce, as well as our resulting architectural and production outcomes. In
In any value stream, there is always a direction of flow, and there is always one and only one constraint; any improvement not made at that constraint is an illusion. If
In high-performing organizations, everyone within the team shares a common goalquality, availability, and security arent the responsibility of individual departments but are a part of everyones job, every day.
In high-performing organizations, everyone within the team shares a common goalquality, availability, and security arent the responsibility of individual departments, but are a part of everyones job, every day.
management hints that the person guilty of committing the error will be punished. They then create more processes and approvals to prevent the error from happening again.
Our goal with a product-based funding model is to value the achievement of organizational and customer outcomes, such as revenue, customer lifetime value, or customer adoption rate, ideally with the minimum of output (e.g., amount of effort or time, lines of code). Contrast this to how projects are typically measured, such as whether it was completed within the promised budget, time, and scope.
Stop starting. Start finishing.
The deal [between product owners and] engineering goes like this: Product management takes 20% of the teams capacity right off the top and gives this to engineering to spend as they see fit. They might use it to rewrite, re-architect, or re-factor problematic parts of the code base...whatever they believe is necessary to avoid ever having to come to the team and say, we need to stop and rewrite [all our code]. If youre in really bad shape today, you might need to make this 30% or even more of the resources. However, I get nervous when I find teams that think they can get away with much less than 20%.
This kind of service-oriented architecture allows small teams to work on smaller and simpler units of development that each team can deploy independently, quickly, and safely. Shoup notes, Organizations with these types of architectures, such as Google and Amazon, show how it can impact organizational structures, [creating] flexibility and scalability. These are both organizations with tens of thousands of developers, where small teams can still be incredibly productive.
When every team expedites their work, the net result is that every project ends up moving at the same slow crawl.