xewma.arl.f | R Documentation |
Computation of the (zero-state) Average Run Length (ARL) function for different types of EWMA control charts monitoring normal mean.
xewma.arl.f(l,c,mu,zr=0,sided="one",limits="fix",r=40)
l |
smoothing parameter lambda of the EWMA control chart. |
c |
critical value (similar to alarm limit) of the EWMA control chart. |
mu |
true mean. |
zr |
reflection border for the one-sided chart. |
sided |
distinguishes between one- and two-sided EWMA control chart by choosing |
limits |
distinguishes between different control limits behavior. |
r |
number of quadrature nodes, dimension of the resulting linear equation system is equal to |
It is a convenience function to yield the ARL as function of the head start hs
. For more details see xewma.arl
.
It returns a function of a single argument, hs=x
which maps the head-start value hs
to the ARL.
Sven Knoth
S. V. Crowder (1987), A simple method for studying run-length distributions of exponentially weighted moving average charts, Technometrics 29, 401-407.
xewma.arl
for zero-state ARL for one specific head-start hs
.
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