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Course contents

  • How to Use This Course
  • Reading Path
  • CDC/RDC Glossary
  • CDC/RDC Metrics Reference
  • CDC/RDC Interview Prep
  • CDC/RDC Signoff Cheatsheet
  • Clock Domains and Failure Modes8
  • Metastability and Synchronizers16
  • CDC Protocols and Handshakes16
  • Reconvergence and Gray Coding16
  • Reset Domain Crossing16
  • Architecture and Design Rules16
  • CDC Signoff Methodology24
  • RDC Signoff16
  • Debug and Case Studies11
  • CDC and RDC Interview Prep30
    • CDC/RDC Whiteboard Framework
    • CDC/RDC Framework Drills
    • Scenario: Metastability Bug
    • Scenario: Metastability Escape in Silicon Bring-up
    • Scenario: Async FIFO Pointer Mismatch
    • Scenario: Waiver Debate
    • Scenario: RDC Waiver Under Tapeout Pressure
      • The Scenario
      • What You Would Do
      • Communicating the Risk
    • CDC/RDC Interview Q&A Bank
    • CDC/RDC Interview Q&A Bank (Expanded)
  • Capstone: Sign Off a Multi-clock Peripheral4
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‹Scenario: RDC Waiver Under Tapeout Pressure
  1. Topics
  2. CDC & RDC
  3. CDC and RDC Interview Prep
  4. Scenario: RDC Waiver Under Tapeout Pressure
  5. Communicating the Risk

Part 10 · Interview Prep · All levels

Communicating the Risk

Reporting the triage to leadership: position, residual risk, and what you need, in writing.

On this page

    The report to leadership has four sentences. Position: how many items are waived with evidence, how many conditional, how many refused. Residual risk: what the refused and conditional items can do in the field, stated as boot-sequence failures on named variants, never as "low risk". What you need: the milestone decision, recorded, with the open items carried explicitly rather than silently dropped. And the follow-up: intent refresh, variant re-analysis, and the fixes scheduled with owners before the next gate.

    How to say refuse without drama

    Refusals fail when they sound like caution and succeed when they sound like accounting. "I cannot sign item 14 because its reset intent predates the ECO and no reset-aware test covers the variant's release order; signing it means accepting an unquantified boot risk on that variant, which I am recording as open." No adjectives, no predictions of doom, no blame: each clause names a missing check the programme can choose to fund. Programmes overrule engineers sometimes; the written record is what makes an overrule a decision instead of an accident.

    What the interviewer scores

    Whether your communication changes anyone's behaviour: does leadership leave knowing exactly which variants carry which risk and what each fix costs? Candidates who report counts without consequences score 2; candidates who attach field behaviour, owners, and dates to every open item score 4. The dashboard discipline behind this report is Signoff Readiness.

    Interview

    Practise the four-sentence report at ninety seconds. Interviewers promote candidates whose bad news is precise: precise bad news gets funded, vague bad news gets waived.

    Check yourself Leadership asks: "so are we safe to tape out?" What is the honest answer shape?

    "On the checked variants for the waived items, yes, with this evidence. On the refused items and the unchecked variant, the risk is an unquantified boot failure, carried open with owners and dates. The decision is yours; my sign covers only the evidenced items."

    Related topics

    • Next: CDC/RDC Interview Q&A Bank

    • Pre-tapeout gates

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    See also

    • The Scenario