In addition to the Lean-oriented terms kaizen blitz and improvement blitz, the technique of dedicated rituals for improvement work has also been called spring or fall cleanings and ticket queue inversion weeks. Other terms have also been used, such as hack days, hackathons, and 20% innovation time. Unfortunately, these specific rituals sometimes focus on product innovation and prototyping new market ideas, rather than on improvement work, and worse, they are often restricted to developers—which is considerably different than the goals of an improvement blitz.†
