统计过程控制（Statistical Process Control，SPC）是一种利用统计学原理来监控和控制生产过程的方法。其核心目的是通过实时监控生产过程的关键质量参数，确保生产过程的稳定性和一致性，从而提高产品质量，减少浪费，并优化生产效率。一、关键组成 1. 控制图（Control Charts）: 控制图是一种图形工具，用于显示生产过程中...
CUSUM charts, while not as intuitive and simple to operate as Shewhart charts, have been shown to be more efficient in detecting small shifts in the mean of a process. In particular, analyzing Average Run Length for CUSUM control charts shows that they are better than Shewhart control charts ...
The most critical assumption made concerning statistical process control (SPC) charts, i.e., Shewhart Control Charts, is that of data independence from one observation to the next (not autocorrelated) [1, 2]. The second assumption is that the individual observations are approximately normally distr...
Usually the Control Limits that are calculated will be within the tolerance limits of the process. The aim is to react when the control limits are exceeded by investigating and rectifying the special cause. Charts which use subgroups give greater protection from false alarms generated by non ...
SPC is method of measuring and controlling quality by monitoring the manufacturing process. Data is collected and used to evaluate, monitor and control a process.
All statistical process control charts plot data (or a statistic calculated from data) versus time, with control limits designed to alert the analyst to events beyond normal sampling variability.Our STATGRAPHICS Centurion SPC software packages provide one of the most extensive collection of control ...
You can use this component to monitor production processes and product quality and to view graphical information which indicates whether the production process is in statistical control. By monitoring variation in the manufacturing process by means of one or more SPC control charts, you can detect oc...
controlstatisticalounceslsluslcapable 1StatisticalProcessControl(SPC)StephenR.LawrenceAssoc.Prof.ofOperationsMgmtStephen.Lawrence@colorado.eduLeeds.colorado.edu/faculty/lawrence2ProcessControlTools3ProcessControlTools Processtoolsassessconditionsinexistingprocessestodetectproblemsthatrequireinterventioninordertoregainlostcont...
a process behaves predictably to produce as much conforming product as possible with the least possible waste. While SPC has been applied most frequently to controlling manufacturing lines, it applies equally well to any process with a measurable output. Key tools in SPC are control charts, a foc...
Reading SPC ChartsThe Goal of SPC: The goal of SPC is to meet or improve any process capability, or simply put, what a process can produce within specification and meeting our customer expectations without any quality issues. SPC can be a very powerful technique when applied correctly but is...