Final answer:
Minimum achievable dimensional tolerance increases with part size, as larger parts have greater variations in manufacture, requiring larger tolerances.
Step-by-step explanation:
The relationship between minimum achievable dimensional tolerance and part size can be summarized as follows: Tolerance increases with part size. This is because larger parts tend to have greater variations and inaccuracies in their manufacture and thus require larger tolerances to ensure that parts fit together properly in an assembly.
In contrast, small parts can be manufactured with tighter tolerances, thanks to the precision that is achievable due to their small scale. The precision of a measuring tool and its smallest measurement increment directly affect the precision and tolerance of parts.