Decision latency
Defined
The wall-clock time from "a decision is required" to "the decision is committed, documented, and communicated." It is measured per decision class, because the distribution differs materially — a specification-level requirements trade is not a tooling-config change, and averaging them hides the latency that actually costs you.
Why speed alone is insufficient
A fast decision that cannot be trusted is not an asset. A decision is high-confidence only when four conditions hold:
- Provenance is durable — the data, analyses, and models behind it are identifiable, retrievable, and version-pinned. A reviewer a year later can reconstruct what was known at the time.
- The approval chain is explicit — the roles authorized to approve are defined, the approvals are captured, and a reviewer can tell who signed and on what basis.
- The confidence floor is defined — the minimum evidence the decision class requires is written down and conformed to, not implicit.
- The decision is discoverable — the record lives in the authoritative store, not buried in one person's inbox.
Why it is the dominant cost
In legacy engineering organizations, decision latency explains more of the delivered cost, schedule, and defect variance than any other operating metric. Headcount, tool spend, and methodology novelty are secondary. The implication is direct: the largest measurable recovery available to most engineering organizations is not more people or more tooling — it is shortening the time from question to committed, defensible answer.