What does it indicate if a sketch is over-dimensioned?

When a sketch is described as over-dimensioned, it means that there are more dimensions specified than are necessary to fully define the part or assembly, leading to redundancy in measurements. This redundancy can create confusion for those interpreting the sketch, as multiple dimensions may not align with one another or may lead to conflicting interpretations. Thus, option B accurately reflects that over-dimensioning can hinder clarity and proper communication in engineering drawings.

In contrast, options like well-defined parts, cost-effectiveness, or meeting quality standards do not accurately address the implications of over-dimensioning. A well-defined part requires clear and precise dimensions, while cost-effectiveness relates to the economic aspects of design, and quality standards pertain to the adherence to specific criteria, none of which are improved by the presence of excessive dimensions in a sketch.