Discussion in 'Lean, Six Sigma and DFSS' started by reynald, Sep 12, 2015.
I saw this relationship on a training video.
What is the logic behind this relationship?
Found the answer to this. Apparently the relationship is generalized from Queuing Theory, specifically Little's Law.
This law states that
L = λ W
Where the variables may be interpreted as
L = average number of WIP
λ = average processing time
W = average time spent of the material as a WIP
Using these, you can derive
L/ λ = W
and (L/ λ ) is basically same as days of supply.
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