bjorke
10-30-11, 12:31 PM
http://youtu.be/J7zb8YXrmIA
Folding Bikes - folding bike ROI
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fietsbob
10-30-11, 01:09 PM
spelling with a . in the wrong place wont go where you wanted to suggest.
bjorke
10-31-11, 09:23 AM
really? I just clicked the link as posted and it went DIRECTLY to the correct video
Here is an overview of the ROI math:
Cr - cost of rigid bike
Cf - cost of similar folding bike
Cl - cost of lock
initially: Cf > (Cr+Cl)
but iteratively, when incorporating
R - # of replacements due to theft
Wc(R) - lock weighting function, which represents the rising cost of better and better locks as R increases
Cf < Σ(R) (Cr + Wc(R)*Cl)
Since for cases using Cf, R remains zero.
Here is an overview of the ROI math:
Cr - cost of rigid bike
Cf - cost of similar folding bike
Cl - cost of lock
initially: Cf > (Cr+Cl)
but iteratively, when incorporating
R - # of replacements due to theft
Wc(R) - lock weighting function, which represents the rising cost of better and better locks as R increases
Cf < Σ(R) (Cr + Wc(R)*Cl)
Since for cases using Cf, R remains zero.