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Material de apoyo para el video control estadístico del proceso

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Laksmi Rodriguez
Laksmi Rodriguez

The document discusses statistical process control (SPC) and variability in manufacturing processes. It contains a conversation between Laksmi and Dany where they discuss concepts like variability, how it can be represented numerically and graphically, and the Nelson rules for identifying unnatural patterns in processes based on criteria like points outside control limits. The conversation helps explain key SPC terms and how the Nelson rules are used to distinguish natural from unnatural variability patterns.

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PROCESOS INDUSTRIALES EN EL ÁREA DE MANUFACTURA SPC CONTROL ESTADÍSTICO DEL PROCESO LIC. EDGAR GERARDO MATA ORTIZ
LAKSMI RODRIGUEZ CORTEZ DANIEL AGUILERA MUÑOZ 3°C Laksmi: What is the variability in processes? Dany: Variability is a kinf of small changes that are involuntary and unavoidable in the process.
Laksmi: ¿Can be represented as the varibility? Dany: The variability can be represented numerically. With the variance calculation and graphically with a histogram. Laksmi: The rules attempt to distinguish unnatural patterns from natural patterns based on several criteria:
Dany: The absence of points near the centerline Laksmi: The absence of points near the control limits Dany: The presence of points outside the control limits. Laksmi: Other unnatural patterns Dany: What are the rules nelson?
Laksmi: Nelson Rule 1 One point is more than 3 standard deviations from the mean. Dany: Nelson Rule 2 Nine (or more) points in
a row are on the same side of the mean. Laksmi: Nelson Rule 3 Six (or more) points in a row are continually increasing (or decreasing).
Dany: Nelson Rule 4 Fourteen (or more) points in a row alternate in direction, increasing then decreasing.
Laksmi: Nelson Rule 5 Two (or three) out of three points in a row are more than 2 standard deviations from the mean in the same direction. Dany: Rule 6 Four (or five) out of five points in a row are more than 1 standard
deviation from the mean in the same direction. Laksmi: Nelson Rule 7 Fifteen points in a row are all within 1 standard deviation of the mean on either side of the mean.
Dany: Rule 8 Eight points in a row exist with none within 1 standard deviation of the mean and the points are in both directions from the mean.
Material de apoyo para el video control estadístico del proceso

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Material de apoyo para el video control estadístico del proceso

  • 1. PROCESOS INDUSTRIALES EN EL ÁREA DE MANUFACTURA SPC CONTROL ESTADÍSTICO DEL PROCESO LIC. EDGAR GERARDO MATA ORTIZ
  • 2. LAKSMI RODRIGUEZ CORTEZ DANIEL AGUILERA MUÑOZ 3°C Laksmi: What is the variability in processes? Dany: Variability is a kinf of small changes that are involuntary and unavoidable in the process.
  • 3. Laksmi: ¿Can be represented as the varibility? Dany: The variability can be represented numerically. With the variance calculation and graphically with a histogram. Laksmi: The rules attempt to distinguish unnatural patterns from natural patterns based on several criteria:
  • 4. Dany: The absence of points near the centerline Laksmi: The absence of points near the control limits Dany: The presence of points outside the control limits. Laksmi: Other unnatural patterns Dany: What are the rules nelson?
  • 5. Laksmi: Nelson Rule 1 One point is more than 3 standard deviations from the mean. Dany: Nelson Rule 2 Nine (or more) points in
  • 6. a row are on the same side of the mean. Laksmi: Nelson Rule 3 Six (or more) points in a row are continually increasing (or decreasing).
  • 7. Dany: Nelson Rule 4 Fourteen (or more) points in a row alternate in direction, increasing then decreasing.
  • 8. Laksmi: Nelson Rule 5 Two (or three) out of three points in a row are more than 2 standard deviations from the mean in the same direction. Dany: Rule 6 Four (or five) out of five points in a row are more than 1 standard
  • 9. deviation from the mean in the same direction. Laksmi: Nelson Rule 7 Fifteen points in a row are all within 1 standard deviation of the mean on either side of the mean.
  • 10. Dany: Rule 8 Eight points in a row exist with none within 1 standard deviation of the mean and the points are in both directions from the mean.