Nothing

```
## FRN.R
## This is a the function for calculating the Fill Rate Numerator using the poisson distribution
## for an initial stock level (j), demand rate (Lam), and average time to restore (t).
## This function is presented as equation 4.2 in "Statistical Theory of Reliability and Life Testing,
## Probability Models" by Richard E. Barlow and Frank Proschan.
##
## (C) David J. Silkworth 2014
##
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by the
## Free Software Foundation; either version 2, or (at your option) any
## later version.
##
## These functions are distributed in the hope that they will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, a copy is available at
## http://www.r-project.org/Licenses/
##
FRN<-function(j,Lam,t) {
if(j==0) {
thisNumerator<-0
}else{
thisNumerator<-Lam*ppois(j-1,Lam*t)
}
return(thisNumerator)
}
```

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