For the CUSUM chart
: assuming that the UDP and ICMP source bytes are normally distributed, with mean [[micro].sub.0] and standard deviation [sigma].
The risk-adjusted cusum chart
was calculated by adding 1 minus the individual patient risk score to the cumulative score for each failure and subtracting the risk score for each failed attempt.
The CUSUM chart
may indicate that at least one and possibly two changes took place.
The first chart has a tighter control limit which requires a smaller sample size, and the second one is a CUSUM chart
The CUSUM chart
readily detected changes in the mean moisture content that were not detected with an X-chart.
TABLE 1 Select Capabilities of QI Macros for EXCEL * Pareto chart * Runs charts * Scatter chart * Matrix plot * Box and whisker plot * Frequency histogram * Dot plot * Multivariate plot * Cusum chart
* Control charts (13) * Control chart rules * ANOVA and statistical analysis (21) * Fill-in-the-blanks templates * Data transformation * Training and tech support
The Shewhart chart in Figure 2a shows that Trials 25, 26, 27, and 35 are "out of control." The same data (standardized and accumulated) are presented in a CUSUM chart
The resulting CUSUM chart
for the discharge air temperature can be seen in Fig.
A cusum chart
for monitoring a proportion when inspecting continuously.
To determine the impact of autocorrelation, the data were plotted using the Shewhart individuals chart, the moving average chart, the Cusum chart
, and the EWMA chart.
The EWMA control chart differs from the similar Cusum chart
by using the additional weighting factor, which allows the adjustment of shift sensitivity.
The Quangle--a modification of the Cusum chart
. Appl Statistics 1982;31:155-8.