Ops 571 Week 2 Assignment Statistical Process Control

Wk 2 Statistical Process Control MethodsChristina ForresterPhoenixOPS/571November 1, 2017Statistical Process Control projectThe statistical Process Control (SPC) project will use data to determine when the process is working as required and when it is not. Quality will be controlled by analyzing the variations and deciding when they are within the design parameters and when the process requires correction. The project will make use of process control charts to monitor processes and help identify assignable causes for variations.ShaftCo produces screw shafts, in one of the machines the specification limit is 9mm. The company takes measurement of a sample of four screws at regular intervals of 3 hours. On a particular day the samples wereas follows Base dataMeanStandard deviationRangeSample 198.18.77.58.3250.66521.5Sample 210.487.97.28.3751.39613.2Sample 38.29.27.97.78.250.66581.5Sample 47.97.77.79.38.150.77241.6Sample 58.297.48.68.30.68311.6Sample 68.48.18.48.78.40.24490.6Sample 77.488.99.88.5251.052.4Sample 87.68.58.18.88.250.51961.2Total13.6The