Hi,
I am currently working in a project on extracting REE from ionic clay sources and wondered whether SPC can be used to determine the process capability of the extraction. For example, plotting recovery rate of 30 trial runs of extraction and calculating Cpk value?
Cpk alone is not the answer before Cpk one need to see normality of the process one expected for capability. Any outliers need to assessed before going for Process Capability determine.
one need to look into what time data is ... if it is a process it will flow some pattern some distribution first of all one need to make a note of that. then one can move to next steps like process improvement, process capability
Narasimha Chary Ml does normality means that I have to first find mean recovery rate of the extraction process itself then establishing LCL and UCL?
how measure recovery how the different unit of recovery data points spread you need to put recovery data points in a linearity equation, you need to see variation among recovery output (measured units) are statistically significant or not
this verification method called normality checking.
basically i need to understand what is the unit of recovery how you quantity unit of measurement is more important for any application of statistical tools
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