PROC CUSUM: Syntax

The CUSUM Procedure

Syntax

The syntax for the INSET statement is as follows:

INSET keyword-list </ options> ;

You can use any number of INSET statements in the CUSUM procedure. Each INSET statement produces a separate inset and must follow an XCHART statement. The inset appears on every panel (page) produced by the last XCHART statement preceding it.

Keywords specify the statistics to be displayed in an inset; options control the inset’s location and appearance. A complete description of the INSET statement syntax is given in the section Syntax of Chapter 13, The SHEWHART Procedure. The INSET statement options are identical in the CUSUM and SHEWHART procedures, but the available keywords are different. The options are listed in Table 13.87. The keywords available with the CUSUM procedure are listed in Table 6.8 to Table 6.11.

Table 6.8 Summary Statistics
Keyword	Description
ARL0	average run length for zero shift
ARLDELTA	average run length for shift of $\text{[math]}$
DATA=	arbitrary values from SAS-data-set
N	nominal subgroup size
NMIN	minimum subgroup size
NMAX	maximum subgroup size

Table 6.9 Parameters for One-Sided (Decision Interval) Cusum Scheme
Keyword	Description
DELTA	shift to be detected as multiple of standard error
H	decision interval $\text{[math]}$ as a multiple of standard error
HEADSTART	headstart value $\text{[math]}$ as a multiple of standard error
K	reference value $\text{[math]}$
MU0	target mean $\text{[math]}$
SHIFT	shift to be detected in data units
STDDEV	estimated or specified process standard deviation

Table 6.10 Parameters for Two-Sided (V-Mask) Cusum Scheme
Keyword	Description
ALPHA	probability of Type 1 error
BETA	probability of Type 2 error
H	vertical distance between V-mask origin and upper (or lower) arm
K	slope of lower arm of V-mask
SIGMAS	probability of Type 1 error as probability that standard normally distributed variable exceeds a specified value in absolute value

You can use the keywords in Table 6.11 only when producing ODS Graphics output. The labels for the statistics use Greek letters.

Table 6.11 Keywords Specific to ODS Graphics Output
Keyword	Description
UALPHA	probability of Type 1 error
UARLDELTA	average run length for shift of $\text{[math]}$
UBETA	probability of Type 2 error
UDELTA	shift to be detected as multiple of standard error
UMU0	target mean $\text{[math]}$
USIGMA	estimated or specified process standard deviation

Top of Page