Quality Rate
Quality rate is the OEE component measuring the proportion of total production that meets the defined good-output requirement.
What this term means in maintenance
Quality rate is the OEE component measuring the proportion of total production that meets the defined good-output requirement.
Formula
Quality rate = Good count ÷ Total count × 100
Practical example
A process produces 1,000 units and 950 meet the good-output definition.
Quality = 95%
Quality losses
Losses may include:
- Scrap
- Rework
- Startup rejects
- Process defects
- Incorrect assembly
- Packaging defects
Maintenance connection
Equipment condition, settings, wear, sensors, and calibration can influence quality.
Common mistake
Excluding reworked units from total count can overstate the quality rate.
How this term differs
Quality Rate is the good-output factor within OEE. It is related to Performance Rate, Overall Equipment Effectiveness, and OEE Availability, but these terms describe different records, measures, roles, strategies, or decisions and should not be used interchangeably.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Overall Equipment Effectiveness
Overall Equipment Effectiveness, or OEE, measures how effectively planned production time is converted into good output by combining availability, performance, and quality.
Calibration
Calibration is the documented comparison of a measuring instrument against a known reference to determine its accuracy and confirm whether it remains suitable for use.
Six Big Losses
The Six Big Losses are common categories of production loss affecting equipment availability, performance, and quality.
Quality Rate FAQs
- How is quality rate calculated?
Good count divided by total count.
- What losses reduce quality?
Scrap, rework, startup rejects, process defects, and incorrect assembly.
- Should reworked units count as good output?
The organization should define this carefully, but original defects should remain visible.