How do you quantify/justify your job value as a data analyst or scientist?

To all data analysts and scientists out there:

How do you explain the value you create for a company? Do you use any form of quantification (i.e., monetarizing)? Do you record all your analysis, insights, tasks, or projects to show your boss?

I recently tried to convince the CEO of a manufacturing company to start going to be data-driven. So use data for improved decision making, improve processes and quality on the shop floor.

However, the CEO said that such …

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