“Traditional, heavyweight development methodologies can be very effective at solving well‑defined problems, where the person solving the problem has a clear understanding of the initial and goal states, the available options, and the constraints on the problem. At the opposite end of the spectrum are ill‑defined, so-called wicked problems. When it’s necessary to balance numerous, often‑conflicting factors, traditional development methodologies are much less effective.” (Peter Hornsby – UXmatters)