Who controls dimension placement? In practice, what entities govern where and how dimensions are placed on a drawing sheet so that the layout remains readable and compliant?

Introduction / Context:
Dimension placement affects readability, manufacturability, and inspection. Good practice balances international standards, company-specific conventions, and the designer's intent, ensuring drawings communicate clearly across teams and suppliers.

Given Data / Assumptions:

• ANSI/ASME standards prescribe general rules for dimensioning and tolerancing.
• Companies often publish internal drafting manuals to standardize templates and placement conventions.
• Design engineers make judgment calls to emphasize function and inspection flow.

Concept / Approach:
Compliance arises from layered guidance: global standards define the baseline; corporate standards tailor presentation; the engineer decides final placement to support design intent and manufacturing clarity. Therefore, all three influence dimension placement.

Step-by-Step Solution:

Verification / Alternative check:
Run a drawing review checklist comparing placement against both company and ANSI rules; correct any inconsistencies before release.

Why Other Options Are Wrong:
Each single-source answer leaves out the others. In reality, all three layers operate together, making “All of the above” the only complete choice.

Common Pitfalls:
Overcrowding dimensions or scattering them across unrelated views can confuse machinists. Group dimensions by feature and datum scheme.

Final Answer:
All of the above