But 'value' is an underlying central theme of ET IMO.  It is what connects all the diaries together, although some of us come from a toally different direction. Multidisciplinary or Transdisciplinary - take your pick.

Although discredited by 'Time & Motion' excesses, OR (Operational Research) iss till the best method for seeing the forest from the trees - as I am know you Miners have been taught ;-)

You can't be me, I'm taken