Dakota Reference Manual
Version 6.4
LargeScale Engineering Optimization and Uncertainty Analysis

Selection of statistics to compute at each response level
Alias: none
Argument(s): none
Default: probabilities
Required/Optional  Description of Group  Dakota Keyword  Dakota Keyword Description  

Required (Choose One)  Group 1  probabilities  Computes probabilities associated with response levels  
gen_reliabilities  Computes generalized reliabilities associated with response levels  
Optional  system  Compute system reliability (series or parallel) 
The compute
keyword is used to select which forward stastical mapping is calculated at each response level.
Default Behavior
If response_levels
is not specified, no statistics are computed. If response_levels
is specified but compute
is not, probabilities will be computed by default. If both response_levels
and compute
are specified, then on of the following must be specified: probabilities
, reliabilities
, or gen_reliabilities
.
Expected Output
The type of statistics specified by compute
will be reported for each response level.
Usage Tips
CDF/CCDF probabilities are calculated for specified response levels using a simple binning approach.
CDF/CCDF reliabilities are calculated for specified response levels by computing the number of sample standard deviations separating the sample mean from the response level.
method sampling sample_type random samples = 100 seed = 1 complementary distribution response_levels = 3.6e+11 4.0e+11 4.4e+11 6.0e+04 6.5e+04 7.0e+04 3.5e+05 4.0e+05 4.5e+05 compute reliabilities