Amy Edmondson also talks about the concept of a “Learning organisation” – essentially a complex system operating in a vastly more complex, even chaotic wider environment. Using automation to reduce the cognitive load of people is important: by reducing the extraneous cognitive load, we maximise the germane, problem solving capability of people. Human beings like you and I (I don’t wish to be presumptive but I’m assuming that you’re a human reading this). Operators and on-call engineers need to address issues in a systematic and repeatable way and do their best to remove emotion and fear from the equation. Psychological safety is a necessary condition (though not sufficient) for the  conditions of resilience to be created and sustained.Â, Therefore we must create psychological safety in our teams, our organisations, our human “systems”. They possess known unknowns – by which we mean that you can find the answer if you know where to look. Admitting things will go wrong isn’t easy for anyone or any team. The Future of DevOps Is Resilience Engineering MP4 | Video: AVC 1280x720 | Audio: AAC 44KHz 2ch | Duration: 30M | 92 MB Genre: eLearning | Language: English Amy will talk about what Resilience Engineering is, how it relates to DevOps, and how it gives us … The only way to do that is to make sure the data supports it; thus, part of resilience engineering is making sure the data is there. There is even a Resilience Engineering Association. For more on creating a just, learning culture with DevOps, check out the article Why You Need a DevOps Consultant. Are they different or just different names for the same thing? (Eds.). Resilience engineering has the word “engineering” in, which makes us typically think of machines, structures, or code, and this is maybe a little misleading. The practice of chaos engineering was a practice developed by Netflix. When working with complex systems, feedback loops that facilitate continuous learning about the changing system are crucial. (2008). Amy Edmondson also talks about the concept of a “Learning organisation” – essentially a complex system operating in a vastly more complex, even chaotic wider environment. Advancing resilience through chaos engineering and fault injection. Available on irgc.epfl.ch and irgc.org. (complex, even chaotic systems). Resilience therefore is about “systems” adapting to unforeseen events, and the adaptability of people is fundamental to resilience engineering. And if resilience is the potential to anticipate, respond, learn, and change, and people are part of the systems we’re talking about: We need to talk about people: What makes people resilient? “Resilience is about the creation and sustaining of various conditions that enable systems to adapt to unforeseen events. We create, build, and maintain psychological safety via three core behaviours: Psychological safety enables these fundamental aspects of resilience – the sustained adaptive capacity of a team or organisation. Garvin, David & Edmondson, Amy & Gino, Francesca. Complex systems resist reductionist attempts at determining cause and effect because the rules are note fixed, therefore the effects of changes can themselves change over time, and even the attempt of measuring or sensing in a complex system can affect the system. Resilience engineering must rely on data. This type of gamified event helps to introduce development teams to the concept of resilience. (David Woods, Professor, Integrated Systems Engineering Faculty, Ohio State University). https://www.sciencedirect.com/science/article/pii/S0951832018309864. Article posted by Classic Damburagamage. Aldershot, UK: Ashgate. Manage cognitive load – so people can focus on the real problems of value – such as responding to unanticipated events. problem. That is why it’s worthwhile to talk about resilience engineering and what makes it effective. Amy will talk about what Resilience Engineering is, how it relates to devops, and how she thinks it gives us the science and research we need to take our organizations to the next level of robustness while remaining agile and growing our ability to care for the people around us. This refers to anything from analysing system logs to identify errors or future problems, to managing Work In Progress (WIP) to highlight bottlenecks in a process. Consider Dave Snowden’s Cynefin framework: Obvious systems are fairly easy to deal with. With DevOps we build systems that respond to demand, scale up and down, we implement redundancy, low-dependancy to allow for graceful failure, and identify and react to security threats. Resilience is a verb. Changes in infrastructure, such ... Tuesday, December 15, 2020 - 11:00 am EST, Application Performance Management/Monitoring, Click to share on LinkedIn (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Tumblr (Opens in new window). The first question most will ask however is, “Isn’t this just SRE?” The purpose of the term is to change the focus from simply reacting to incidents to developing long-term response strategies for them. In these cases, acting first is necessary. Resilience Engineering also refers to “systems”, which might also lead you down a certain mental path of mechanical or digital systems. DevSecOps is a set of principles and practices that provide faster delivery of secure software capabilities by improving the collaboration and communication between software development teams, IT operations, and security staff within an organization, as well as with acquirers, suppliers, and other stakeholders in the life of a software system. A modern motorcar, or a game of chess, are complicated – but possess fixed rules that do not change. 7 As we can see in the previous section, DevOps is a broad set of principles about whole-lifecycle collaboration between operations and product development. Without this, we cannot engineer resilience.Â. Instead, maybe try to think about engineering being the process of response, creation and change. ; Inject failures or delay network responses in your application. Chaos engineering helps test the resiliency of the system by proactively throwing common failures at the system. Our website uses cookies. DevOps’ approach to safety focuses on mitigating the impact of known modes of failure -- “known unknowns” like bad deploys, host failures, etc. A common refrain in the field of resilience engineering is “there is no root cause”, and blaming incidents on “human error” is also highly frowned upon, as Sydney Dekker explains so eloquently in “The Field Guide To Understanding Human Error”. Chaos engineering aims at identifying the vulnerabilities within the system by using resilience testing. Safety II professionals: how resilience engineering can transform safety practice. Resilience engineering. The term “Resilience Engineering” is appearing more frequently in the DevOps and technology world, and there exists some argument about what it really means. : Let’s go back to that phrase at the start: What we’re trying to create is an organisation, a complex system, and sub systems (maybe including all that software we’re building) that possesses a capacity for sustained adaptation. What is not obvious is how to execute it. This is another place where traditional SRE practices grow with a focus on resilience. Available at https://www.sciencedirect.com/science/article/pii/S0951832018309864. 109-16, 134. Part of that is establishing habits and decision-making processes for those who are on-call. It is the belief, within a group, “that one will not be punished or humiliated for speaking up with ideas, questions, concerns, or mistakes.” – Edmondson, 1999. Resilience is here the ability to return to the steady-state following a perturbation. That activity can be the source of answers, it can be the triggers for rollback, or it can be the clarity needed to prevent similar issues in the future. Communication is rapid, and top-down or broadcast, because there is no time, or indeed any use, for debate. Resilience engineering is “The intrinsic ability of a system to adjust its functioning prior to, during, or following changes and disturbances, so that it can sustain required operations under both expected and unexpected conditions.” Prof Erik Hollnagel. The intrinsic ability of a system to adjust its functioning prior to, during, or following changes and disturbances, so that it can sustain required operations under both expected and unexpected conditions. Site Reliability Engineering (SRE) is a term (and associated job role) coined by Ben Treynor Sloss, a VP of engineering at Google. It is temporarily unlisted. The practice in complex systems is probe, sense, and respond. Engineering resilience considers ecological systems to exist close to a stable steady-state. You may want to think back to the cynefin model, and think of robustness as being able to deal well with known unknowns (complicated systems), and resilience as being able to deal well with unknown unknowns (complex, even chaotic systems). Technological or DevOps practices that primarily focus on systems, such as microservices, containerisation, autoscaling, or distribution of components, build robustness, not resilience. The primary outcome should be knowing how to do it even better next time. ” Prof Erik Hollnagel. They’re all systems in the broader sense. To build a culture of resilience at your company, start small and create getaway habits. DevOps is an important paradigm shift to bridge the gap between the typically siloed development teams and operations teams. As Erik Hollnagel has said repeatedly since Resilience Engineering began (Hollnagel & Woods, 2006), Create foresight about future operating conditions, revise models of risk, Maintain deployable reserve resources available to keep pace with demand, Coordinate information flows and actions across the networked system, Search for brittleness, gaps in understanding, trade-offs, re-prioritisations, Provan et al (2020) build upon Hollnagel’s four aspects of resilience to show that resilient people and organisations must possess a “, ”, and states “This requires employees to have the psychological safety to apply their judgement without fear of repercussion.”, Resilience is therefore something that a system “. Resilience engineering: Concepts and precepts. As Erik Hollnagel has said repeatedly since Resilience Engineering began (Hollnagel & Woods, 2006), resilience is about what a system can do — including its capacity:Â, (From Resilience is a Verb by David D. Woods), Provan et al (2020) build upon Hollnagel’s four aspects of resilience to show that resilient people and organisations must possess a “Readiness to respond”, and states “This requires employees to have the psychological safety to apply their judgement without fear of repercussion.”. Resilience engineering should ensure that telemetry across the entire delivery chain is captured, correlated and shared. BT. Knowing how data will be collected, consumed and actualized is also necessary. The DevOps culture shift within engineering is a response to demands for agility, moving code through the pipeline as efficiently and effectively as possible. 0800-DEVOPS #17 – John Allspaw, resilience engineering and DOES 2020 conference #16 0800-DEVOPS #16 – Tanya Janca, The Value of DevOps Transformation and one developer survey Chaos engineering can be used to achieve resilience against: Infrastructure failures; ... diagnoses, and resolutions. DevOps and psychological safety are two important components of resilience engineering. Lausanne, CH: EPFL International Risk Governance Center. Available at: https://erikhollnagel.com/ideas/resilience-engineering.html (Accessed: 17 November 2020). (Garvin et al, 2008), “A resilient organisation adapts effectively to surprise.” (Lorin Hochstein, Netflix). Toggle Navigation . Create psychological safety – this means that people can ask for help and “apply their judgement without fear of repercussion.”. The resilience stack will include: For those with a relatively mature and automated environment, the next step is chaos engineering—embracing chaos as a way to get ahead of incidents before they happen in the wild. Consider appropriate team topologies to facilitate adaptability. Stress the CPU, burn the I/O, or stop one of your Azure virtual machines.See the continually growing list of Azure activities for Azure infrastructure resources. Acknowledging your own fallibility. 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