---
title: "Glossary | Recurline"
description: "Plain definitions of OEE, availability, microstops, changeovers and the other terms used in plant loss reviews."
canonical: https://recurline.com/glossary
---

Glossary

# The words, defined plainly.

 Availability | The share of planned time a line was actually running, before speed or quality are considered.

Baseline | The starting level of a loss, measured before a fix, against which an improvement is judged.

Changeover | The time between the last good unit of one product and the first good unit of the next, including cleaning and verification.

First-pass yield | The share of product made right the first time, with no rework or scrap.

Loss tree | A breakdown of lost time into categories and sub-categories, from the total gap down to specific causes.

Microstop | A stop shorter than about five minutes, easy to miss in manual logs.

MTBF | Mean time between failures. How long equipment runs, on average, between failures.

MTTR | Mean time to repair. How long, on average, it takes to get a line running again after a stop.

OEE | Overall Equipment Effectiveness. Availability × performance × quality: how much of planned time went into making good product at full speed.

Performance rate | How fast a line ran while running, compared with its agreed ideal speed.

Planned vs unplanned downtime | Planned downtime is scheduled in advance. Unplanned downtime is everything else that stops production.

Quality rate | The share of all units made that were good. First-pass yield is the stricter version, with no rework.

Root cause analysis | A structured way to find the underlying reason a loss happened, not just where it showed up.

Run rate | The loss or output over a short period, scaled up to a longer one. An estimate, not a saving.

Shift | A scheduled block of production time worked by one crew.