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  • Improving Speed and Stability of Software Delivery Simultaneously at Siemens Healthineers

    In this article, we focus on the software delivery process at Siemens Healthineers Digital Health. The process is subject to strict regulations valid in the medical industry. We show our journey of transforming the process towards speed and stability. Both measures improved at the same time during the transformation, confirming research from the “Accelerate” book.

  • How to Spread Technical Practices Like TDD in an Organization

    One of the success factors for Agile and DevOps is developers changing the way they work and adopting practices like Test-Driven Development (TDD). It’s not something that just happens by itself, and many of the “usual” ways of introducing change fail for TDD. This article outlines some of the things that actually do work and explains “Samman,” which is a coaching method used with developers.

  • The Value and Purpose of a Test Coach

    Introducing business-oriented automated testing can involve a huge cultural change. For this we really need a Test Coach role, just like we have agile coaches and scrum masters. In this article we hear from someone living this new role, using Domain Oriented Testing on a daily basis to ensure acceptance tests have full story coverage, and unit tests verify business behavior, not implementation.

  • Who is in Charge of Quality in Software Development

    As silos break down, the whole team is responsible for quality in software development. As process more and more defines people and processes, how can you strive for better quality of releases?

  • Developing Microservices with Behavior Driven Development and Interface Oriented Design

    These dependencies require well-defined and well-tested services. Behavior Driven Development (BDD) and Interface Oriented Design (IOD) help achieve this. BDD concentrates on the functionality of the services, which are specified with tests. IOD identifies contractual obligations (e.g. failure reporting) of the services.

  • Adopting Continuous Delivery at teamplay, Siemens Healthineers

    Continuous Delivery is about working in a way that keeps the system in a releasable state throughout its development. This article describes how a large software development organization at Siemens Healthineers started the transformation towards Continuous Delivery. It describes the strategy and tactics used to gradually and safely change the development process in a regulated medical domain.

  • How Contract Tests Improve the Quality of Your Distributed Systems

    Catching bugs at the end of a development cycle is costly, but how do you incrementally test complex distributed systems? In this article, Marcin Grzejszczak looks at an integration testing approach for communication between components. He reviews contract testing, and Spring Cloud Contract, as one solution.

  • Coaching Technical Practices

    In the past 4-5 years I have been working as a software development coach, helping organizations around London improve their technical practices. I focus on XP practices, specifically TDD, Pair Programming, Refactoring and Simple Design. In this article I share my experiences organizing coaching sessions, including subject selection and sequencing, exercises for each subject and session formats.

  • A Quick Guide to Implementing ATDD

    Collaboration is one of the core values of Agile Methodology. That being said, what happens when you notice lack of collaboration between developers, testers and business-minded individuals in agile teams? This article provides a quick guide to implementing Acceptance Test Driven Development (ATDD) in your projects to mitigate problems due to lack of collaboration.

  • Is TDD a Form of OCD?

    Developers are increasingly testing their own and each other's code. "Evaluation anxiety" is common psychological condition that is directly impacted by self-testing and team-testing. Are practices like TDD a defense mechanism to protect coders from criticism? And do emerging methods like Behavior Driven Development represents a more emotionally healthy approach to team evaluation?

  • Perspective on Architectural Fitness of Microservices

    In this article we peel the onion of potential architectural fitness of microservices in the context of Master Data Management, and the challenges a microservices-based architecture may face when solving problem domains that require compute-intensive tasks, such as the calculation of expected losses on a portfolio of unsecured consumer credit.

  • Automated Journey Testing with Cascade

    Starting with a brief history of software testing, we investigate Cascade, a new framework for testing “journeys”, eliminating overlapping coverage to produce fast unit tests.

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