different between quality control & quality assurance
P Chart.
U Chart
In a scenario where the arrival patterns of bugs are not constant, an appropriate control chart to use would be the Cumulative Sum (CUSUM) control chart. This chart is useful for detecting small shifts in the process mean over time, making it suitable for tracking rejections in a maintenance project where bug arrivals may vary unpredictably. Additionally, the Poisson control chart could also be considered if the data on bug arrivals is count-based and follows a Poisson distribution.
Can improve our process,
Using a control chart shows the effects of alterations to your process and helps you correct any errors in real time. You can also predict the range of possible future results.
what is group chart in quality control
Statical involve movement, transformation, reaction.
Statical friction
A Q chart, or Quality Control chart, is a statistical tool used to monitor and control a process by tracking its performance over time. It visually displays data points in relation to specific control limits, helping to identify variations that may indicate issues in the process. By analyzing these charts, organizations can make informed decisions to improve quality and maintain consistent output. Q charts are commonly used in manufacturing, healthcare, and service industries for quality assurance.
One can find many examples of quality control charts on the 'StatSoft' website where they have examples of common types of chart. One can also find examples on 'Gigawiz'.
Perhaps the most characteristic tool of statistical quality control is the control chart. In its simplest form the control chart is a continuous record of some feature of a process that is deemed to indicate whether that process is 'in control' or not. As long as the control chart shows that the process is within, say, three standard deviations of its mean behaviour it will be considered 'in control'; otherwise not, and steps to correct it taken.Before this system can be put into operation experimentation will be necessary, which implies the need for experimental design. One the system is in place, attempts are often made to find ways of improving the process under control to reduce the number of departures outside the control limits, or to narrow the limits.Please see the link.
relevance of du-pont control chart to the industry?
Quality control in manufacturing
control it
statical history. (history with statistics)
statical asistent
Q.1 (a) How Operator Quality Control is different from Foreman Quality Control?