An ERROR or mistake occurs when a person makes a wrong decision or takes an incorrect action. This can happen in various contexts, such as in mathematics, where a calculation might be incorrect, or in daily life, where someone might forget an important appointment. Errors can result from misunderstandings, lack of information, or simple oversight. Errors are often categorized into different types, such as human errors, which are mistakes made by individuals, and systematic errors, which arise from flaws in a process or system. Learning from errors is essential for improvement, as it helps individuals and organizations identify weaknesses and make necessary adjustments.