Práctica 10

START

The selected instrumentso are calibrated?

No

Yes

Select 1 measuring instrument

Verify the instrument is in well conditions and calibrated

Is the table clean and balanced?

No

Yes

Clean it and/or balance it

Calibrate it

Screws

Select two operators as metrologists

Calculate the reproducibility of the measurements

Select the objects of study

In excel. calculate the average range

Compute the sample average

Calculate the average range ( r bar bar)

Determine the x bar range

Obtain the upper and lower specification limits

Calculate the repeatability of the measurements

Weighing machine

Determine the practice objective: Develop an R&R study to analyze a magnitude by assessing the importance of calibration, of influence quantities and reliability in a measurement system

Have you finished measuring the samples?

Take all of the 30 measurements

No

Yes

Obtain the R&R

END

Graph the measurements of both objects

Analyze if the measurements are under control

Analyze if the measuring system is appropriate for the objects

Make the practice report and analyze the data obtained

Nuts

Each operator measures 15 screws in two test made aleatory

Each operator measures 15 nuts in two test made aleatory