1. A Levy-Jennings quality control chart is a graphic representation of the acceptable limits of variation in the results of an analytic method.

2. Control charts and statistical quality control generally became popular during World War Il and peaked in the late 1940s.

3. In addition, p control chart is used to analyze and control the unqualified rate of the binding.

4. A control chart may indicate an out-of- control condition when some nonrandom patterns occur.

5. Quality control chart is a kind of statistical method used for controlling production process quality.

6. Objective To investigate status of studies using quality control chart and to provide reference for related studies.

7. In this paper the method on T2 control chart, by which the sample mean vectors of several related quality characteristics are controlled simultaneously in a process(http://), is introduced.

8. The use of a control chart requires that the engineer or analyst select a sample size, a sampling frequency or interval between samples, and the control limits for chart.

9. Is there a SPC control implemented and control chart updated for critical parameters?

10. The method of making a single background quality control chart and its application in the long-term stability of RIA counter are studied.

11. In this paper, PCA and statistical control chart have been used to detect process operating faults on an industrial rolling mill reheating furnace.

12. In this paper, we investigate quality control chart construction under random fuzzy environment on the foundation of the axiomatic credibility measure theory.

13. Examples have shown that the improved quality control chart could determine calibration cycle of the equipment in light of the drift condition.

14. Finally, improved control chart constants are given by Monte Carlo simulation.

15. As the process runs, further sample means are plotted on the control chart.

16. The performance is then monitored and maintained in routine use by means of control charts.

17. Data thus accumulated are evaluated statistically using a quality control chart.

18. At last, the actual production data is used to verify the correctness of residual control chart.

19. The limit values of type 16V280ZJA diesel engine were determined by means of quality control chart based on plentiful monitoring data.

20. APL(average product length) is proposed as the criterion for measuring control chart performance to study the optimal design of skewed control chart.

21. In the thesis, the importance of index is decided by partial least square regression method, and CUSUM control chart monitoring the variation of customer satisfaction is introduced.

22. In the Quality Control System of auto industry, the process control chart has been regarded as an important control instrument.

23. Based on such an objective indicator, the traditional quality control chart can be improved and adjust the producing process better.

24. Although some methods, such as time series model based residual control chart, have been used for solving the autocorrelation data issue, they are too complex to be practiced in industry.

25. The research is developed for meeting this requirement that Quality-oriented statistical tolerance and CUSUM control chart to be concurrently designed.

26. The quality of cold drink and foods sanitary inspection in Huangshan City in 1980-1989 were analysed by the method of Rate control chart.

27. Presents the principle of statistics process control, the judgement of state in statistical control for a process by means of control chart, and the analyses and improves process capability.

28. Methods Reforged the sterilized supply service flow , formed a service flow and main quality control chart.

29. Familiar the process audit and the SPC , have experience of SPC control chart.

30. If the sample observation is beyond the control limit, it signals as the control chart with fixed sampling interval (FSI).

31. The design and project of numeral control chart are put forward, and the composing of system, functional structure and methods of realization are discussed also in this paper.

32. This paper points out that only when an economic control chart is designed can it be made use of economically, and the key problem is how to determine the economic control limit.

33. This paper studies the aspect that use EXCEL to make the quality control chart environmental monitoring.

34. Even worse, it will leave out the real alarm in abnormal process. This paper researches in the serial correlation of quality control charts and will improve the theory of quality control chart.

35. Controlcharts of Zero-Nonconformity Production based on normal distribution are established in the paper, which makes up thedeficiency of the Shewhart control chart.

36. The quality control chart is an important tool for TQC.

37. The main tasks are below:1 The dynamic EWMA mean control chart is extended to EWMA variance control chart. The EWMA variance control chart with variable sampling intervals under normality is proposed.

38. This system can act as a kind of monitoring measure parallel to conventional control chart.

39. When told the data are from an exponential or Erlang distribution the Six Sigma Black Belt should know that the run chart is preferred over the standard X control chart.

40. Quality control chart is a useful tool for monitoring produce process in statistics state and reducing waster.

41. Control limits and sampling interval are two essential parameters of control chart.

42. The optimization model of parameter design for control chart was constructed to monitor the quality of production process, and it was solved by genetic algorithm.

43. Furthermore, the statistical method has been used to standardize the sample data which becomes the important basic of quality control chart.

44. Methods A railroad hospital bed efficiency index before and after the railroad! medical security system reform was analyzed through applying the method of quality control chart.

45. The median control chart introduced in this article can be used in the process of small-batch production.

46. The quality control chart theory and computer technology are combined, and the machining oriented control chart system is established based on this combination.

47. In this paper, we talk about how to make use of principle component method to construct multivariate quality control chart. Then we take ...

48. On the basis of it, X-R control chart is used to analyze and monitor the packaging solvent residual quantity during the compound process.

49. The control chart being core tool of SPC technology and its application in microcircuit manufacture are described in detail.

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50. Control chart as a efficient way for disease warning, with much more to be improved.

51. Residual control chart is the method of using the residuals of time series models to control the quality of the auto-correlated process.

52. Results The quality control chart was made for estimating sickbed work.

53. The control chart theory and computer technology are combined, and the quality control chart system is established based on this combination.

54. In this paper, the problem of using automatic air monitoring system for the quality control chart was discussed and improved quality control of the mapping method was present.

55. Numerous comparisons of ARLs indicate that the GWMA control chart is more sensitive than the EWMA control chart for detecting small shifts in the process variance.

56. MethodsBased on the theory of normal distribution and central limit theorem of the statistics, the immune control chart is proposed, which combines the immune idea.

57. Under these circumstances, because of serial correlation, the monitoring capacity of quality control chart will be affected heavily, and it increases the probability of false alarm in normal process.