Accuracy vs Precision

This is an educational guide focused on the fundamental differences between accuracy and precision within the context of engineering measurements. It defines accuracy as the proximity of a data point to its actual value, often compromised by systematic errors or calibration biases. In contrast, precision refers to the consistency and repeatability of results, which is typically undermined by random errors or environmental noise. Through the use of dartboard analogies and satellite altitude examples, the source illustrates how a system can be consistent without being correct, or correct on average while remaining widely scattered. The material also outlines practical methods for improving data quality, such as calibrating sensors to boost accuracy or reducing noise to enhance precision. Ultimately, the text emphasizes that reliable space-engineering decisions require measurements that are both reliable and correct.