CDC/RDC Whiteboard Framework: Design Space

Design space exploration

For CDC/RDC Whiteboard Framework, signoff options trade reliability, latency, and schedule.

Option A — conservative

• Conservative synchronization: helps robustness

• Risk: latency increase

• Validate with: stress regressions

Option B — balanced

• Balanced protocol design: helps throughput + safety

• Risk: higher design effort

• Validate with: formal + simulation

Option C — aggressive

• Aggressive waiver posture: helps schedule relief

• Risk: escape risk

• Validate with: periodic waiver audit

Option D — refactor

• Architectural refactor: helps long-term safety

• Risk: schedule hit

• Validate with: system bring-up

DESIGN SPACE — CDC/RDC Whiteboard Framework
robustness <-> latency <-> complexity <-> schedule

Design pitfalls

• Waive-first behavior

• No owner for residual risk

Tradeoff curve

BEFORE / AFTER — CDC/RDC Whiteboard Framework

open critical issues
  ^
  |  o baseline
  |     o after fix batch
  |         o after protocol proof
  |             o signoff-ready
  +---------------------------------> closure iteration

Track issue burn-down with evidence quality, not only count.

CDC/RDC deep dive

Interview performance reflects production signoff thinking quality.

Concept diagram

INTERVIEW FLOW

classify -> explain mechanism -> propose fix -> state regression

Metric graph

PRACTICE SCORE

session1 62%
session2 78%
session3 89%

Reports and artifacts

• scenario completion

• answer rubric scores

• trap recovery quality

Mini case study

Candidate gave command-heavy answer but missed risk framing and waiver governance.

Debug branches

• Use mechanism-first structure

• name ownership and evidence

• close with signoff decision

Senior review question

Ask: what evidence proves this risk is closed for silicon, not just tool-clean?

Key takeaways

• State crossing class, assumptions, and owner with every issue.

• Run structural and dynamic regressions after each fix.

Common pitfalls

• Treating all warnings as equivalent risk.

• Waiving issues without containment evidence.

• Skipping reset and reconvergence stress after CDC fixes.