This book explains what factors may influence business cycle life stages. Why can some businesses experience growth life cycle stage, then going to mature life cycle stage rapidly? Otherwise, some businesses need long time to experience growth and mature life cycle stages. What factors may influence the business may reach growth life cycle stage and mature life cycle stage? Why does some businesses experience decline life cycle stage rapidly ? I shall explain these issues how and why factors may influence any kinds of business develop in their business life cycle stages. In first chapter, I shall explains why organizations need strategy to be implemented as well as what business model means as well as why business organizations may experience different life cycle stages. In second chapter, I shall explain that economic recession or boom how influences consumer behavior e.g. the business had been experiencing decline life cycle stage, such as COVID -19 disease occurrence. I shall explain how to apply business development strategy to raise the educational robotic manufacturer sale number.