"NPVI = New product vitality index (products introduced within the past five years, divided by total sales)
3M Innovation Story PDF - The Ideas Accelerator
http://www.ideasaccelerator.com/.../2011-NZ-Innovation-Counc...‎

"Sure, 3M has been in existence since 1902, and still reaps benefits from inventions introduced in the early 20th century, such as masking tape and Scotch tape. But to borrow a metaphor from physiology, while the company's chronological age is 111, its biological age is a much smaller number. 3M is bent on bringing new products to market. The company measures itself in this area by a metric it developed in the late 1980s known as the "New Product Vitality Index," or NPVI. This metric tracks the proportion of company revenues from new products (defined as products less than five years old) to all products sold. In 2008, 3M calculated its NPVI at 25%. Last year, 3M's NPVI was 33%. The company is shooting for an NPVI of 40% by 2017. "
The 3M You Don't Know (GE, MMM, SI, UTX) - The Motley Fool
http://www.fool.com/investing/general/2013/06/.../the-3m-you...