SAS/QC software provides specialized DATA step functions for computations related to control chart analysis, for Bayes analysis of screening designs, and for sampling plan evaluation. You can use these functions in DATA step programming statements. The following lists summarize these functions:
Function |
Description |
---|---|
C4 |
expected value of the standard deviation of a sample from a normal population with unit standard deviation |
CUSUMARL |
average run length for a cumulative sum control chart scheme |
D2 |
expected value of the range of a sample from a normal population with unit standard deviation |
D3 |
standard deviation of the range of a sample from a normal population with unit standard deviation |
EWMAARL |
average run length for an EWMA scheme |
PROBMED |
cumulative distribution function of sample median |
STDMED |
standard deviation of median of a standard normal sample |
Function |
Description |
---|---|
BAYESACT |
posterior probabilities of variance contamination |
Function |
Description |
---|---|
AOQ2 |
average outgoing quality for double-sampling plan |
ASN2 |
average sample number for double-sampling plan |
ATI2 |
average total inspection for double-sampling plan |
PROBACC2 |
acceptance probability for double-sampling plan |
In addition, the PROBBNML and PROBHYPR functions, which are provided in Base SAS software, are useful when evaluating single-sampling plans.
The twelve SAS/QC functions, together with the PROBBNML and PROBHYPR functions, are described in the Function Descriptions section. The section Details, summarizes types of sampling plans and gives additional definitions.