Low Power / UPF · All levels
UPF Consistency Audit: Comparison Matrix
Comparison Matrix for UPF Consistency Audit.
Comparison matrix
Handoff and audit rigor trade schedule speed versus downstream defect rate.
+------------------+----------------+----------------+----------------+
| Approach | Strength | Weakness | Best when |
+------------------+----------------+----------------+----------------+
| Conservative | robust | higher overhead | new architecture |
| Balanced | efficient | needs coverage | production |
| Aggressive | low leakage | higher escape risk | late tuning |
| Refactor | clean model | long cycle | repeated escapes |
+------------------+----------------+----------------+----------------+When to choose each approach
Choose policy based on transition-risk profile and release phase
Interview traps
Policy copied without domain context
No transition replay evidence
Evidence comparison
LOW-POWER EVIDENCE MATRIX — UPF Consistency Audit
+----------------------+-----------------------------+-----------------------------+-------------------------+
| Evidence | Tells you | Does not prove | Next action |
+----------------------+-----------------------------+-----------------------------+-------------------------+
| UPF lint report | object validity | transition behavior | run transition tests |
| state coverage | visited states/transitions | crossing correctness | inspect policy binding |
| waveform + PMU trace | signal ordering | full scenario completeness | extend regression set |
| formal LP checks | proven policy classes | analog/transient IR effects | pair with signoff IR |
| signoff dashboard | closure trend | local root cause | assign owner + action |
+----------------------+-----------------------------+-----------------------------+-------------------------+Low-power deep dive
Cross-tool intent drift is a leading source of late low-power escapes.
Concept diagram
RTL+UPF -> synthesis view -> PD view -> signoff consistencyMetric graph
MISMATCH TREND
handoff week1 ███████
week2 ████
week3 ██Reports and artifacts
RTL handoff checklist
post-synth LP report
PD LP implementation report
consistency diff
Mini case study
Synthesis and PD used mismatched UPF revisions; only consistency audit exposed the drift.
Debug branches
Compare UPF revision tags
Check object rename mapping
Run semantic consistency tool
Senior review question
Ask: what transition evidence proves this topic is closed, and which owner signs it?
Key takeaways
State transition context must accompany every low-power metric claim.
Intent changes require simulation, formal, and implementation re-validation.
Common pitfalls
Comparing results from mismatched UPF revisions.
Assuming static checks replace transition validation.
Shipping with aged waivers and unclear ownership.
Execution drill pack 1
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 1
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 2
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 2
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 3
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 3
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 4
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 4
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 5
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 5
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 6
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 6
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 7
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 7
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 8
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 8
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 9
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 9
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 10
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 10
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 11
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 11
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 12
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 12
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 13
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 13
PATH: low-power/upf-implementation-flow/upf-consistency-audit/comparison-matrix
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Principal LP review addendum
Consistency audits compare intent interpretation across RTL, synthesis, PD, simulation, and formal views to prevent semantic drift.
Metric: cross-tool mismatch count, stale UPF object references, and signoff waiver backlog