When checking dimensions, the key consideration should be?

The key consideration when checking dimensions is the tolerances specified. Tolerances are critical in manufacturing and machining because they define the acceptable range of variation in a part's dimensions. Understanding these tolerances ensures that the part meets design specifications and will function properly in its intended application.

When dimensions are measured, it's essential to compare them against the tolerances outlined in the design documentation. This comparison helps to determine if the part is acceptable for use or if it requires further machining or adjustment. Accurate measurements within the permitted tolerances ensure that parts fit together correctly, maintain their intended function, and reduce the likelihood of failure or the need for rework.

While considerations such as the ease of measurement, the age of the measuring tool, and the condition of the part may affect the measuring process, they do not impact the fundamental requirement of adhering to the specified tolerances in terms of the part's functionality and quality.