Which milestone provides the basis for making the decision to begin the fabrication of production prototype systems?

Which milestone provides the basis for making the decision to begin the fabrication of production prototype systems?

• A. Preliminary Design Review
• B. Approved detail design
• C. Conceptual Design
• D. Final Deployment Plan

Answer: (B)

Fabrication of production prototype systems should begin when the detailed design has been finalized and approved. This stage provides a complete, manufacturing-ready baseline: fully defined drawings and specifications, a bill of materials, defined tolerances, interface requirements, and explicit assembly and verification plans. With approval, there’s formal authorization that the design is mature enough for fabrication, and that risks have been addressed and stakeholders sign off on proceeding. Earlier stages, like conceptual design, focus on feasibility and broad concepts rather than the specifics needed to actually build, so they don’t justify starting production. The final deployment plan comes later, dealing with rolling out the system after prototypes are built and validated, not the decision to fabricate.

Fabrication of production prototype systems should begin when the detailed design has been finalized and approved. This stage provides a complete, manufacturing-ready baseline: fully defined drawings and specifications, a bill of materials, defined tolerances, interface requirements, and explicit assembly and verification plans. With approval, there’s formal authorization that the design is mature enough for fabrication, and that risks have been addressed and stakeholders sign off on proceeding. Earlier stages, like conceptual design, focus on feasibility and broad concepts rather than the specifics needed to actually build, so they don’t justify starting production. The final deployment plan comes later, dealing with rolling out the system after prototypes are built and validated, not the decision to fabricate.