Step-by-step analysis walkthrough

Use when you own Bump Map & Escape Planning in a top-level integration review.

1. Open latest integration baseline and manifest.

2. Inspect failing metric by domain.

3. Trace first failing contract boundary.

4. Collect artifacts and assign single-thread owner.

5. Define minimal proof experiment.

6. Apply smallest reversible fix.

7. Run focused check then full regression.

8. Update dashboard and governance log.

9. Decide: close, waive with expiry, or escalate.

10. Publish final review memo.

Artifacts to collect

• bump map revision, escape routing plan, package feasibility report

• baseline manifest

• owner matrix

• regression summary

• risk memo

Decision memo template

SOC DECISION MEMO — Bump Map & Escape Planning
baseline:
metric:
root cause:
fix:
residual risk:
owners: package owner, top-level PD owner, power integrity owner

Reference visuals

Bump escape planning

BUMP + ESCAPE

die bumps -> redistribution -> package balls
      |             |
   power grid    high-speed lane escape

Early escape planning prevents late route deadlock.

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