INTRODUCTION FOR GAGE REPEATABILITY AND REPRODUCIBILITY (GR&R)
GR&R is necessary to ensure that Measurement Systems have the necessary capability to detect changes in your product or process performance. It is essential to have a reference to standards so that product and process specifications are consistent. Consequently, GR&R is required by ISO or IATF Standards (e.g. IATF 16949). This training will be conducted as per AIAG MSA Manual 4th Edition
COURSE OBJECTIVES
- Conduct measurement system studies including assessment of linearity, stability, repeatability, and reproducibility.
- Differentiate components of variation in a measurement system.
- Understand how to make improvement after GR&R studies.
- Develop the ability to compare gauge variation to tolerances.
- Establish gauge correlation and corrective factors.
INTENDED AUDIENCES
- Engineers
- Quality Professionals
- Supervisors
- Metrology Technicians
- R&D Engineers
- Project Engineers
METHODOLOGY
- This workshop will be interactive with a lots of exercises and active participation from audience
- Participants are expected to bring along laptops
- Minitab 18 will be used during the training
COURSE CONTENT
GR&R Course Objectives
- Purpose of Gauge Capability Studies
- Standards
- Traceability
- Test Procedures
- Objectives of GR&R
Basics of measurement – possible variations
- Equipment Variation
- Appraiser Variation
- Measurement System Variation (GR&R)
- Part-Part Variation
- Total Variation
Gage Measurements – possible errors
- Bias
- Accuracy
- Stability
- Linearity
- Repeatability
- Reproducibility
Variable GR&R – short methods
- Study Preparation and Step to carry out this methods
- Example (Short Method)
Variable GR&R – long methods
- Study Preparation and Step to carry out this methods
- Study Execution
- Criteria of Acceptance of GR&R
- Sample of Long Method Data Sheet
- Example (Long Method)
Other GR&R studies
- For destructive measurements
- For attribute measurements
- GR&R with Minitab 18
Improving measurement systems
- Effectiveness E
- Probability of a miss P(Miss)
- Probability of a false alarm P(FA)
- Bias B
- Using problem solving approach to find the root causes of repeatability and reproducibility problems
- Some basic causes to investigate if the gage/instrument repeatability is high
- Some basic causes to investigate if the appraiser reproducibility is high
