Observability by definition is a measure of how well internal states of a system can be inferred from knowledge of its external outputs. In other words, a system's behavior is determined from its outputs—information obtained by certain measures. Though observability as a term has been used for many years, the modern understanding originates in software observability, which is the ability to collect data about program execution, internal states of modules, and communication between components.
Posted February 09, 2023