In the context of software architecture, the concepts of "Error" and "Failure" are distinct yet related, each representing a different stage in the process where something goes wrong in a system.
An "Error" is essentially a deviation from correctness or accuracy, occurring when a system component does not perform its intended function correctly. This can be due to a variety of reasons, including programming mistakes (faults), incorrect logic, or the failure of a component to respond as expected. Errors are the manifestation of faults within the system. For instance, if a function designed to add two numbers together returns an incorrect result due to a mistake in the code, this incorrect result is an error. It represents a discrepancy between the computed or observed value and what was intended or specified[3].
On the other hand, "Failure" is the inability of a system or component to perform its required function within specified performance levels. It occurs when an error propagates through the system and affects the delivered service, leading to a situation where the system can no longer fulfill its intended purpose. A failure is essentially the manifestation of an error in a way that impacts the user's experience or the system's operation. For example, if the incorrect result from ...
