I
iii_v
hello all,
I apologize in advance if this is has been hashed out (or so basic it's not worth asking). but i couldn't do a good search to find what i need.
by the way, I'm spanking-new to QA.. and I'm frantically trying to figure out what I'm trying to calculate... so please bear with me.
A customer has asked for GR&R information on our test setup. I think we have data to generate the value, but I have no idea how to calculate it.
1 test equipment
1 operator
3 control units that has 4 channels (essentially 3x4=12 separate measurements per test)
50+ tests (yes. 50x12 data points!)
I can get stdev for each separate channel (have 12 separate stdev). after that, what do I do? also another stupid question is, what unit is GR&R and what does it really mean? (e.g. GR&R=1 vs GR&R=10, 20, etc. I guess I'm sort of looking for a rule-of-thumb guidlines like, GR&R=y is ideal, GR&R=z is very bad, etc).
help!
Linda
I apologize in advance if this is has been hashed out (or so basic it's not worth asking). but i couldn't do a good search to find what i need.
by the way, I'm spanking-new to QA.. and I'm frantically trying to figure out what I'm trying to calculate... so please bear with me.
A customer has asked for GR&R information on our test setup. I think we have data to generate the value, but I have no idea how to calculate it.
1 test equipment
1 operator
3 control units that has 4 channels (essentially 3x4=12 separate measurements per test)
50+ tests (yes. 50x12 data points!)
I can get stdev for each separate channel (have 12 separate stdev). after that, what do I do? also another stupid question is, what unit is GR&R and what does it really mean? (e.g. GR&R=1 vs GR&R=10, 20, etc. I guess I'm sort of looking for a rule-of-thumb guidlines like, GR&R=y is ideal, GR&R=z is very bad, etc).
help!
Linda