What should a reproducible floorplan evidence package contain?
From PDVerse PnR Interview Handbook · pdVerse Mentor Guide
Short Answer
Include input and tool provenance, area assumptions, boundaries, rows/sites/tracks, macro and pin constraints, voltage areas, keepouts/blockages, reports, check results, images, waivers, and a write-out that reloads cleanly.
Technical Explanation
The package should let another engineer recreate the same physical state and decision. Use separate report files and preserve object names, versions, scenarios, command options, and measurement settings.
Formula Or Decision Rule
Decision rule: reopen the written floorplan from the approved checkpoint and reproduce key counts and checks.
What To Check
• Warning sign: Only a screenshot or manually edited checkpoint exists. • Inspect: choose one affected region, macro, row, pin, path, or net and trace the physical cause. • Correct: Write the floorplan, archive reports, reload it, and compare the same readiness matrix.
Command Checks & Actions
• write_floorplan -output <output_dir>: writes reproducible floorplan information to files
• report_design -floorplan: reports the floorplan state understood by the tool
Run only the commands needed for this question. Save the report with the floorplan version and analysis context.Healthy, Suspicious & Hard-stop Results
• Healthy: Include input and tool provenance, area assumptions, boundaries, rows/sites/tracks, macro and pin constraints, voltage areas, keepouts/blockages, reports, check results, images, waivers, and a write-out that reloads cleanly. • Suspicious: Only a screenshot or manually edited checkpoint exists. • Hard stop: required legality or physical feasibility is missing or unexplained. Write the floorplan, archive reports, reload it, and compare the same readiness matrix.
Common Mistake
Do not hide the symptom with an arbitrary utilisation, halo, channel, blockage, pin move, or die-size change. Only a screenshot or manually edited checkpoint exists.
What The Interviewer Is Testing
The interviewer is testing whether you can connect “What should a reproducible floorplan evidence package contain?” to measurable physical evidence and an owned correction.
Follow-up Question & Model Response
Follow-up probe: What would make you change your decision? Model response: “I would change it if the same controlled rerun shows that only a screenshot or manually edited checkpoint exists. I would use the named objects and reports to decide whether to iterate, waive, or return the issue.”
Practical Example
Symptom: Only a screenshot or manually edited checkpoint exists. Corrective path: Write the floorplan, archive reports, reload it, and compare the same readiness matrix.
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