Purpose of dimensioning By adding dimensions to a technical drawing, the drafter communicates the size and the location/orientation of part features needed for manufacturing and inspection.

Introduction / Context:
Dimensioning translates design intent into measurable requirements. Without clear and complete dimensions, a part cannot be fabricated or inspected consistently. Dimensions, along with tolerances and datums, define not only size but also the allowable variation and positional relationships among features.

Given Data / Assumptions:

• A part requires manufacturing from a drawing or model.
• Multiple features (holes, slots, faces) must relate to each other.
• Quality control needs objective acceptance criteria.

Concept / Approach:
Good dimensioning practices include locating features from meaningful datums, avoiding redundant or conflicting dimensions, and grouping related dimensions for clarity. Geometric tolerancing further defines form, orientation, location, and runout so functionality is preserved even with small variations in size.

Step-by-Step Solution:

Verification / Alternative check:
Validate the drawing by performing a tolerance stack or simulation to confirm that, within specified limits, assemblies fit and function.

Why Other Options Are Wrong:
“Incorrect” denies the fundamental role of dimensioning. Surface finish is a separate specification. Dimensions are never decorative and are used across detail and assembly drawings as appropriate.

Common Pitfalls:
Overdimensioning the same feature in multiple views, omitting necessary locational dimensions, and failing to indicate default tolerances.

Final Answer:
Correct