Review checklist

Review Checklist for Bump Map & Escape Planning focuses on bump congestion, reroute churn, escape DRC violations. The goal is to map symptoms to boundary contracts, owner actions, and regression-proof closure.

• Baseline manifest and revision are explicit.

• Boundary contracts for this topic are current and approved.

• Ownership map covers all open issues.

• Focused and full regression evidence both exist.

• Residual risks are either closed or bounded via waiver policy.

• Owners signed: package owner, top-level PD owner, power integrity owner.

Signoff ownership

OWNERSHIP MAP — Bump Map & Escape Planning

artifact             owner
-----------------    -----------------
primary owner     package owner
co-owner          top-level PD owner
review owner      power integrity owner

No top-level issue should remain ownerless beyond one review cycle.

SoC deep dive

Package assumptions must be treated as first-class chip constraints.

Concept diagram

PACKAGE CO-DESIGN
die io <-> package routing <-> board constraints

Metric graph

PACKAGE RISK MIX
SI margin █████
power integrity ████
lane mapping ███

Reports and artifacts

• bump map revision log

• SI/PI margin report

• IO co-design checklist

• package bring-up failures

Mini case study

Link degradation on product board came from package routing assumptions not reflected in pre-silicon model.

Debug branches

• Compare package model versions

• Audit lane mapping

• Correlate SI/PI margins to failures

Senior review question

Ask: what baseline, owner, and artifact prove this topic is truly closed?

Key takeaways

• State baseline manifest and owner with every closure metric.

• Run cross-domain regression after every top-level fix.

Common pitfalls

• Comparing results across different manifests.

• Unowned issues slipping through review cycles.

• Waiving risks without expiry and validation plan.

Principal SoC review addendum

Bump maps and escape strategy determine routability, IR quality, and package feasibility before final pad-ring freeze.

Metric: bump congestion, reroute churn, escape DRC violations