It's acutally a lot more simple.  NPV is based on cash flow in and cash flow out, period

Most of the multiplication components I'm talking about are those involved in determining the levels and timing of said expenses and revenue items.   Didn't we hear that on the expense side the 'build time', capex and opex were significantly reduced?  
FX Revenues/earnings, payback, IRR all improving significantly.  Teck having to admit Schaft Creek cost/lb  ~ US$ 0.60 - US$ 0.70 probably tells me that its even way better, lol. 

Then yes at that stage its a "simple" discounting exercise on each year's cash flow-in items vs cash flow-out items to get the final NPV result.   JMHO

GLTA