Design iteration expectations: Should mechanical designers expect to make several revisions and iterations before a design is finalized and released to production?

Introduction / Context:
Iteration is inherent in engineering. As requirements sharpen, analyses reveal weaknesses, and tests uncover improvements, designs are revised to converge on performance, reliability, cost, and manufacturability targets. This question checks understanding of iteration as a norm rather than an exception.

Given Data / Assumptions:

• Projects pass through design reviews and prototyping stages.
• Feedback loops exist from analysis, testing, and suppliers.
• Revisions are controlled through ECO processes.

Concept / Approach:
Iterations include geometry changes, tolerance adjustments, material updates, and process refinements. Each iteration reduces risk and aligns the design with requirements. Skipping iteration often shifts risk to production, increasing cost and delays.

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

Common Pitfalls:

Final Answer: