Quality Reporting for Two Different Turning Operations
The following data sets are extracted from two different lathes, with each performing a turning processes for steel shaft production. The readings are taken directly from a micrometer, and should be 0.258 inches with an acceptable tolerance of +/- 0.005. The diameters are measured per subgroup, and the goal is to be able to see if both processes are capable of their operation by performing both quantitative and qualitative analysis.
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The results are as follows:
Without using statistical analysis, the N-5 process originally appears more capable due to the appearance of its distribution in the frequency chart; but upon closer investigation, both processes have outliers from normal distribution and there are many data point outside the specified limits, marked by the blue and purple lines.
N-7 Turning Operation
Despite the Grouped Data Analysis, further investigation shows that the N-7 process has capability potential due to the trend in its average values and process capability calculation. The N-5 process, on the other hand, shows no signs of possible assignable causes that, when addressed, would lead to overall improvement.
N-5 Turning Operation
