1. QUALITY CONTROL ANALYSIS

2. STATISTICAL QUALITY CONTROL WHAT IS SQC?? SQC is a mathematical study used to investigate a manufacturing process to determine its precision and accuracy. It is used to check and improve the quality control of a manufactured part. Ensure products or services are designed and produced to meet or exceed customer requirements and expectations.

3. USING THE STATISTICAL PROCESS CONTROL ANALYZER

4. SPC EQUIPMENT DIGITAL CALIPER POWER SUPPLY SPC PROCESSOR CABLE

5. DIGITAL CALIPER PARTS INSIDE MEASURING JAWS OUTSIDE MEASURING JAWS LOCK SCREW MEASURING THUMB SCREW DIGITAL WINDOW DEPTH MEASURING NEVER GONNA LET YOU DOWN

6. CABLE CONNECTED TO SPC ANALYZER Cable tab lines up with slot in socket NEVER GONNA RUN AROUND AND DESERT YOU

7. SPC ANALYZER BUTTONS Clear limits Clear entry Feed paper tape Enter data Enter upper & lower tolerance limits Statistical analysis of entered data NEVER GONNA MAKE YOU CRY

8. ABBREVIATIONS FOR STATISTICAL DATA TERMS USL - Upper statistical limit of tolerance LSL - Lower statistical limit of tolerance N - Number of samples taken or data points Max - Maximum value of largest sample Taken Min - Minimum value of smallest sample Taken R - Range of values taken

9. More Abbreviations X bar - Mean of all samples taken O n - STANDARD DEVIATION OF ENTIRE population of samples O n-1 - Standard deviation of a sample of entire population P - Percentage of defective samples (Parts out of specs) Cp - PROCESS CAPABILITY SHOWS precision of process Cpk - Process capability shows both accuracy & precision

10. SPC ANALYSIS STEPS USING TOLERANCES Press (CL) key to clear limits Press (TOL LIM) key to set upper and lower statistical limits of tolerance used Zero digital caliper Manually set caliper to upper statistical limit Press (data) key to set USL (will show on tape as (lmt) Manually set caliper to lower statistical limit Press (data) key to set LSL (will show on tape as (lmt)

11. The rest of the Steps Press (TOL LIM) key to show tolerance limits on paper tape as (usl) and (lsl) Now use the digital caliper to enter measurements of the sample and press the (data) key each time Repeat above step at least 10 times to get 10 samples Press (stat) key to perform a statistical analysis of all the samples entered Press (feed) key after printing stops to advance paper

12. SETTING UP SPC Press (ON) key Tape will show *Print On* Press clear limit (CL) then total limit (TOL) tape shows *Limit Clear*

13. SETTING UP SPC Turn (on) caliper Slide jaws together Press zero key

14. SETTING UPPER TOLERANCE LIMIT Manually set USL of.115 thousands on caliper then press DATA key. This will show on tape as (lmt)

15. SETTING LOWER TOLERANCE LIMIT Manually set LSL of.105 thousands on caliper press data key. This will show on tape as (lmt)

16. CHECKING TOTAL LIMIT *NEW LIMIT DATA* LSL 0.1050 USL 0.1150 TOTAL LIMIT.010 Now press total limit key the tape should read as shown below with a tolerance of.010 or USL-LSL

17. MEASURED SAMPLES OF A PART Take 10 measurements of the part by pressing the data key after each measurement. This can be done in two different ways as shown. Sample being measured in 10 spots

18. ANALYSIS OF DATA TAKEN After all measurements are taken with the caliper and entered into the (SPC) press the (STAT) key for a full analysis of data Data analysis is printed on paper tape

19. THE TAPE Limits Tolerance Readings Statistical data Histogram