V
Vlad12
Hello everybody,
Our plant produces tires. When testing the tire its maximal rolling speed at the bench is referred as a key characteristic.
The matter of test method: operator mounts tire on a rim, pumps it with compressed air, and installs mounted tire in the bench. Tire is automatically pressed to the drum and the drum starts to rotate. Drum speed increases stepwise in certain intervals until the tire destroys. During testing the interval until tire failure is automatically recorded. Testing frequency is one tire in two weeks.
Usually measurement system analysis for destructive testing can be done with ANOVA Nested method.
For example, testing of 10 parts with 2 trials, but there are some problems:
1. it is impossible to make two so much similar tires, so that you can make an assumption of their homogeneity (assumption of samples identity within a part);
2. it will be an expensive research, as at least 20 tires will be destroyed (to provide sufficient sampling of tires for research it might need more than 20 tests).
Can anyone advise a method to research this measurement system? How can we confirm appropriateness of this measurement system for Supplier and during audit?
Our plant produces tires. When testing the tire its maximal rolling speed at the bench is referred as a key characteristic.
The matter of test method: operator mounts tire on a rim, pumps it with compressed air, and installs mounted tire in the bench. Tire is automatically pressed to the drum and the drum starts to rotate. Drum speed increases stepwise in certain intervals until the tire destroys. During testing the interval until tire failure is automatically recorded. Testing frequency is one tire in two weeks.
Usually measurement system analysis for destructive testing can be done with ANOVA Nested method.
For example, testing of 10 parts with 2 trials, but there are some problems:
1. it is impossible to make two so much similar tires, so that you can make an assumption of their homogeneity (assumption of samples identity within a part);
2. it will be an expensive research, as at least 20 tires will be destroyed (to provide sufficient sampling of tires for research it might need more than 20 tests).
Can anyone advise a method to research this measurement system? How can we confirm appropriateness of this measurement system for Supplier and during audit?