Software is unpredictable because there is little demand for predictability. As it is a trade-off, predictability requires experience. Inexperienced application

Software is unpredictable because there is little demand for predictability. As it is a trade-off, predictability requires experience. Inexperienced application of methods to enhance predictability is expensive. Speaking from experience: - Isolate state in modules (micro-services) - Focus on systems language first, external behaviour second, implementation details last. - Design systems to fail and fail fast. - Do not adhere to Postel's law. Be strict in what your systems accept. This forces the systems designer to create a language which is extensible. And general advice for teams: - Consistency is the most important factor in success. Choose rarely and choose wisely your: languages / eco-systems / OSes / cloud services / frameworks. Change based on requirements, not HN popularity.