In the great debate between metric and FFU I have never been given an answer when asked as to exactly what defines a product as being a metric product vs. an FFU product?
 
1.) If a product is designed and engineered as a metric product with rounded metric dimensions, but marketed as an FFU product with rounded imperial dimensions, is the product metric or FFU?  Example, the Floppy Disk
 
2.) Does rounded numbering define whether a product is metric or FFU?  What if a dimension is not rounded in either system of units? 
 
What about products that were once FFU but have been changed to metric, like automobiles or IC chips?   What about products that contain hybrid dimensions?
 
3.) Does personal or official usage define whether something is metric or not?  If a person gave a description of an event in metric units and the media converted it to FFU would the event still be considered metric even if the FFU info dominates?
 
4.) Does accuracy of measurement determine the primary system?  If I measure a product in metric and someone else measures it in FFU and the dimension in metric is closer to the true dimension is the product then considered metric?
 
5.) Does following the rules of a standards body, such as the ISO or IEC define a product to be metric?
 
 
What about a Country?  What defines a nation or people to be metric or FFU?
 
1.) The economy, such as the system in use in the countries industries?
 
2.)  What the country declares itself to be officially?
 
3.) What the people actually use despite the official or economic system?
 
 
Has anyone ever given this an thought and come up with some valid answers?
 
Euric
 
 
 
 

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