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Mining PI Data To Improve Profit - OSIsoft

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One More Caveat…<br />

• Historical data is corrupted by human and<br />

control policies<br />

– Correlation does not mean causation<br />

– Manipulated variable and controlled variable:<br />

a big difference<br />

• <strong>Data</strong> analysis on manipulated variables often<br />

shows relationships that are the opposite of what<br />

you would expect<br />

• This means the “lever” is overvalued<br />

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