First-Silicon Power-on Checklist and Day-0 Triage: Inputs and Outputs

Inputs and outputs contract

Inputs and Outputs for First-Silicon Power-on Checklist and Day-0 Triage is anchored on time-to-first-reproducible-root-cause, stage progression confidence, and recurrence rate after mitigation. Convert observed behavior into mechanism-backed and owner-bound actions.

INPUTS
  - board and fixture configuration state
  - firmware revision and boot arguments
  - corner conditions (V/F/T) and workload window
  - instrumentation profile and trace coverage assumptions

OUTPUTS
  - evidence-backed root-cause class
  - owner-signed mitigation proposal
  - replay validation matrix and rollback triggers
  - release recommendation

Ownership split

OWNERSHIP LAYERS - First-Silicon Power-on Checklist and Day-0 Triage

+----------------------+--------------------------------+--------------------------------+
| Team                 | Primary responsibility         | Closure artifact               |
+----------------------+--------------------------------+--------------------------------+
| bring-up lead | hypothesis map and execution     | triage decision log            |
| firmware owner | stage behavior and software proof | boot/trace evidence packet     |
| Bring-up Fundamentals owner | replay matrix and risk closure    | signoff memo + rollback gates  |
+----------------------+--------------------------------+--------------------------------+

Silicon bring-up deep dive

Bring-up fundamentals reduce chaos by making setup, sequencing, and evidence capture deterministic from first power-on.

Concept diagram

BRING-UP FUNDAMENTALS LOOP

lab setup -> staged power-on -> checkpoint capture -> triage decision
    ^                                                      |
    +-------------------------- baseline discipline -------+

Metric graph

EARLY BRING-UP HEALTH

setup drift incidents      █████
unsafe retries             ███
controlled reruns          █████████
clear owner actions        ███████

Metrics and artifacts to collect

• lab readiness checklist completion

• power sequence trace quality score

• first-day checkpoint success trend

• owner handoff completeness

Mini case study

A program recovered a week of schedule after standardizing board setup metadata and power sequencing templates before additional debug branches.

Debug branches

• Prove bench and fixture state first.

• Confirm rail, reset, and clock dependencies in order.

• Preserve one known-good baseline before variant experiments.

Senior review question

Ask: what is the first failing boundary, which artifact proves it, and who owns bounded closure?

Key takeaways

• Tie every bring-up claim to one reproducible setup state and one proving artifact.

• Prefer bounded fixes with clear owner and rollback trigger over broad multi-variable edits.

Common pitfalls

• Running parallel uncontrolled experiments and losing causality.

• Declaring closure without replaying across representative corners.

• Escalating severity before bench/setup hypotheses are disproven.

Handoff explanation

Inputs should include board state, firmware hash, environment corner, and instrumentation profile.

Outputs should include owner-signed mitigation proposal and validation boundaries.