In most cases, you will have to assume that the center line, X, on the individuals chart is the true value once the test method is in control and monitor future control results against that center line.
在大多数情况下,一旦测试方法处于控制状态, 您就必须假设
体图表上的中心
X 是真实值, 并对照该中心
监控未来的控制结果。