Monitoring the quality of production process using CUSUM control chart
نویسندگان
چکیده
منابع مشابه
The Cusum Chart for Monitoring Short Production Runs
This paper develops a model for the analysis and design of a CUSUM chart for monitoring the process mean in short production runs and proposes statistical measures of performance that are appropriate when the process is not operating indefinitely. The model can be used to evaluate the performance of the CUSUM scheme for any given set of chart parameters and thus allows comparisons with Shewhart...
متن کاملThe Economic Performance of a CUSUM Control Chart for Monitoring Short Production Runs
At the start of a production run, the parameters of the distribution of a quality characteristic are frequently unknown. If the quality characteristic should by monitored on-line by means of a control chart and the production run length is too short, then it is impossible to get a sufficient Phase I number of samples allowing for the correct estimation of parameters and the evaluation of the ch...
متن کاملA CUSUM Control Chart to Monitor Wafer Quality
C-control chart assumes that process nonconformities follow a Poisson distribution. In actuality, however, this Poisson distribution does not always occur. A process control for semiconductor based on a Poisson distribution always underestimates the true average amount of nonconformities and the process variance. Quality is described more accurately if a compound Poisson process is used for pro...
متن کاملA CUSUM Control Chart to Monitor Wafer Quality
C-control chart assumes that process nonconformities follow a Poisson distribution. In actuality, however, this Poisson distribution does not always occur. A process control for semiconductor based on a Poisson distribution always underestimates the true average amount of nonconformities and the process variance. Quality is described more accurately if a compound Poisson process is used for pro...
متن کاملA Control Chart for Monitoring Process Variability
The Shewhart and the Bonferroni-adjustment S control charts are usually applied to monitor the standard deviation of a quality characteristic. The control limits of these charts are constructed using approximately the normal distribution in case that the standard deviation parameter is known or unknown. In this paper, we establish a new S chart that is based approximately on the normal distribu...
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ژورنال
عنوان ژورنال: Skola biznisa
سال: 2016
ISSN: 1451-6551
DOI: 10.5937/skolbiz1-10581