Estimation is a fundamental concept in various fields, including statistics, computer science, and project management. It involves making an educated guess about a quantity or parameter based on available data or experience. In statistics, for instance, estimation is used to infer population parameters from sample data, such as calculating the mean or variance. In project management, developers often face the challenge of estimating the time and resources required to complete tasks, which can be difficult due to uncertainties and lack of prior experience. Mastering estimation techniques is crucial for improving accuracy and efficiency in decision-making processes.