Once upon a time in an insurance company, a CTO (Chief Technology Officer) faced recurrent unavailability of the application supporting insurance quotes, applications, and policies. Such unavailability was perceived differently by stakeholders: - Insurance brokers were frequently unable to process their insurance quotes and applications; - Business teams experienced impacts…

On one hand, the Agile community in its papyrus records “individuals and interactions over processes and tools” [1], on the other hand, the SRE (Site-Reliability Engineering) community in its papyrus states “You can’t 'fix' people, but you can fix systems and processes to better support people making the right choices…

A Tale of Two Cities is a novel by Charles Dickens published in the mid-19th century. Its central theme is duality, which is depicted in the first paragraph of the novel: "It was the best of times, it was the worst of times, it was the age of wisdom, it…

Ok, I have listened to Test Pyramid, indeed, there is plenty of content around this concept. Roughly, the test pyramid concept asserts that the first layer of test, Unit, is cheaper, faster, and has the desired confidence property [1,2,3]. As we climb the pyramid through Integrated and End2End (E2E) tests…

Let us start recalling the conclusion of the last conversation [1]. IT phenomena as cloud, “…-as-a-service”, and microservices, which carry on distributed computing, require reliability engineering since the complexity of systems continues to grow. …

Of course, you have heard about Site Reliability Engineering (SRE), an acronym introduced by Google. The aim of this text is to dissect the acronym using a seesaw (an old-school kindergarten toy) as a conceptual model. …

A didactical way to define a concept is starting by what it is not. Therefore, in Section 1, the focus is on what is not an “architecture for agility”. In Section 2, a case, inspired by a true story, is discussed to clarify what we would call an “architecture for…

Once upon a time, a queen possessed a magic mirror, which she asked every morning, “Magic mirror on the wall, who is the fairest one of all?” The mirror always told the queen that she was the fairest. One day, when the queen asked her mirror, it told her that…

“Everyone makes mistakes. The wise are not people who never make mistakes, but those who forgive themselves and learn from their mistakes.” — Ajahn Brahm (theoretical physicist, author, and Buddhist monk) In this second part, we return to the endeavor of providing, perhaps, for wise people, a shortcut to “learn…