Glossary and FAQ

The executive-analytics terms used across this wiki, and the questions that come up most.

Glossary

OPI	Operational performance indicator: a discipline-level measure the apps compute, such as OEE or MTBF.
KPI	Key performance indicator: a headline measure leadership commits to, with a target and thresholds.
Pillar index	A pillar rolled into a single 0 to 100 score against target.
Portfolio health index	The weighted roll-up of the five pillar indices; the one number for the estate.
Leading indicator	A measure that predicts an outcome, such as PM compliance or inspection coverage.
Lagging indicator	A measure of what already happened, such as OEE or unplanned downtime.
RAG status	Red, amber and green status against a target, to draw attention to exceptions.
Event bus	The shared channel each app publishes metrics and events to, and the dashboard subscribes to.
Publish and subscribe	The loosely-coupled pattern where apps publish and the dashboard consumes, without direct dependency.
Single source of truth	One trusted, lineage-kept value for each metric, read from the owning app, not re-keyed.
Lineage	The recorded path of a number back to the raw reading it came from.
Asset hierarchy	Equipment to system to site to portfolio: the structure numbers roll up and drill down along.
Module licence status	Which app modules are licensed and live at each site, and so which pillars are covered.
GARPI™	The Optimal® benchmark that pillar and portfolio indices can be read against for context.
Governance cadence	The daily, weekly, monthly and quarterly rhythm the dashboard is run on.

Does the dashboard replace the apps?	No. The apps do the operational work; the dashboard rolls up their outputs into an executive view and a governance rhythm. It is a view and a steer, not another operational tool.
Where do the numbers come from?	From the apps, over the event bus. The dashboard reads each metric from the app that owns it and keeps the lineage, rather than re-calculating anything.
Is it live or a monthly report?	Close to live. Indices update as events arrive on the bus, so the executive view reflects the estate now, not last month.
What if a site does not run every app?	The dashboard shows module licence status and marks a pillar as covered, partial or not yet instrumented, so a green pillar is never confused with an unmonitored one.
How is the portfolio index weighted?	On agreed pillar weights, owned and visible, so the roll-up is transparent. Any pillar can be opened to the metrics and assets beneath it.
How does OptimalOEE™ fit in?	OptimalOEE™ is the newest pillar, publishing production performance from source into the roll-up alongside availability, integrity, asset health and spares.