Plain-English definition
What it is
A comparison is valid only when both observations measure the same thing in the same way. If the scope, ruleset, or required observation is missing, the honest verdict is not comparable.
Comparable evidence
Before-and-after observations that share one scope, ruleset, grain, and evidence standard.
Boundary
What it does not prove
- Causation by itself
- A trend from one unmatched snapshot
- Performance when the post-period does not yet exist
Capabilities
What this system enables
Capability 01
Improved, unchanged, or regressed verdicts
Capability 02
Migration monitoring
Capability 03
Strategy evaluation
Capability 04
Defensible trend interpretation
Lifecycle
How readiness progresses
- 01Specified
The comparison rules and observation windows are defined.
- 02Observed
Both sides are captured under the same contract.
- 03Checked
Scope, grain, exclusions, and versions are equivalent.
- 04Interpreted
The verdict states evidence limits and avoids unsupported causation.
What must be true first
- Before evidence
- After evidence
- Shared ruleset version
- Equivalent scope and grain
Decisions it can inform
- Did performance actually change?
- Are these periods comparable?
- Which difference is material?