The phrase "doing the same thing and expecting different results" is often attributed to Albert Einstein, though there's no definitive evidence he said it. It’s commonly used to highlight the futility of repeating actions without change, expecting new outcomes. In practice, this applies across contexts—personal habits, business strategies, or even technical processes. For example, if a manufacturing process (like those you’ve asked about before, such as heat exchangers) consistently yields poor efficiency, tweaking variables like material or design is needed rather than repeating the same setup. Persistence without adaptation leads to stagnation.