Term | Meaning | Taught in |
|---|---|---|
Baseline freeze | Recording the exact design, constraint and tool versions the evidence refers to, then allowing changes only through a recorded process. | |
Closure dashboard | A page with one honest metric per discipline: timing, power, physical, crossings, coverage and connectivity. | |
ECO | An engineering change after the design is frozen. A metal-only ECO changes wiring layers; a respin changes everything. | |
Erratum | A documented difference between the chip and its specification, with the software workaround. | |
Escape rate | Waivers that later caused a silicon problem divided by waivers granted over a window. It keeps the price of excuses visible. | |
Go and no-go | The review decision to release the design, recorded with the evidence and any accepted risks. | |
Integration review gate | A planned review at which the integration state is judged against stated criteria before work continues. | |
Milestone and freeze | A dated point at which a deliverable is complete and a category of change stops. | |
Readiness review | The final meeting at which each owner shows evidence for their area and the integrator calls go or no-go. | |
Signoff manifest | The list of every check, result, version and waiver the chip is judged on, with a checker that compares it with the frozen baseline. | |
Spare cells | Unused gates scattered in the layout so a late fix can be wired with a metal-only change. | |
Waiver | A recorded decision that a reported violation is acceptable, with evidence, an owner and an expiry. | |
Waiver ageing | Review-by and expiry dates on every waiver. In the course's teaching rule a proven-safe waiver is reviewed at 90 days and expires at 180. |
Back to the Glossary for the other groups and the look-alike terms.