Re: Scale Curve Equation


Bill wrote:
> "Aaron M. Renn" <arenn@xxxxxxxxxxxxxxx> wrote in message
> news:dehvv6$qro$1@xxxxxxxxxxxxxxxxx
> > I've got a person here at work who wants to estimate a scale curve through
> > two points. The axes are $/unit (y) and total number of units (x). What
> > this graph is supposed to show is that for each doubling of the number of
> > units you get a decreasing incremental reduction in cost. He claims there
> > is some standard equation for this that estimates the curve based on
> > two points, but I've been unable to locate any such equation through
> > googling. Can anyone help?
> >
I think you'd need at least 3 points to estimate a curve.
> > --
> > Aaron M. Renn (arenn@xxxxxxxxxxxxxxx) http://www.urbanophile.com/arenn/
> >
>
> You could try a(e^(-bx)) = y. And solve for a and b. But this is not a
> standard curve. You could for example have a constant added to the above and
> probably should. It may or may not happen to fit your data well.
>
You definitely need a constant, otherwise the cost would tend to zero
for large volumes.So you'd have to solve for a,b and c. You'd need 3
points to do that.

.

Relevant Pages

  • Re: A french product design student is looking for an internship
    ... >> downright evil if done deliberately to reduce cost. ... he advised a highway design engineer that the ... The engineer said, "Nonsense", and proceeded to drive the curve at ...
    (sci.electronics.design)
  • Re: Super-heavy lift reusable launcher
    ... Not when you look at lowest system cost. ...   While it is feasible to build on the scale you ... What's interesting is if you look at the consumption curve of each ... satellites of this size!! ...
    (sci.space.policy)
  • Re: how to calaculate an early start S-curve and late finish S-cur
    ... corresponding cumulative Work or Cost curve, and another if all Tasks were ... Its just the same curve with the bulge moved to the right. ... there is one cumulative cost curve for the un-leveled ... I'd think there'd be 2 slightly different S-curves based on ES and LS, ...
    (microsoft.public.project)
  • Re: Creating S curve graph with days management
    ... > I'm would like to create a S curve graph but we don't manage the cost ... > How can I create the graph? ... > I saw calculation formula in the help file but It was with the Cost ... I'd suggest you base yours on manhours of labor. ...
    (microsoft.public.project)
  • Re: Scale Curve Equation
    ... > Bill wrote: ... >>> I've got a person here at work who wants to estimate a scale curve through ... Assume there's a fixed cost A and a cost per unit B. ...
    (sci.econ)