Case study – Cloudy Skies Airlines

The rest of this book will follow code examples from an airline called Cloudy Skies Airlines, or Cloudy Skies for short. Through these examples, we should be able to see how technical debt and refactoring can apply to a “real” organization and its software.

Note

Cloudy Skies is a fictitious airline company created for this book for teaching purposes only. Any resemblance to any real company is purely coincidental. Additionally, I have never worked in aviation, so the code examples presented in the book are likely significantly different from actual software systems used in the industry.

Cloudy Skies is an airline that’s been around for the past 50 years and currently operates a little over 500 jets in its fleet, serving around 70 cities in its region.

Twenty years ago, the airline made a major move and started replacing its aging software systems with custom in-house applications built by its development team...