error span; margin of error
Technical term used in computing and measurement contexts to describe the range within which an error may occur.
In this calculation, the error span must be kept within ±0.5%.
許容誤差 is a tolerance or permissible error, often used in engineering; 誤差幅 is a more general term for the error range.
Compound of 誤差 (error) and 幅 (width, range). The term is a straightforward technical coinage.