chapter6S

chapter6S - S6-1Operations Operations...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: S6-1Operations Operations ManagementManagementStatistical Process ControlStatistical Process ControlSupplement 6Supplement 6S6-2OutlineOutlineStatistical Process Control (SPC).Mean chartsorX-Charts.Range chart or R-Charts.Control charts for attributes.Managerial issues and control charts.Acceptance Sampling.S6-3Statistical technique to identify when non-random variation is present in a process.All processes are subject to variability.Natural causes: Random variations.Assignable causes: Correctable problems.Machine wear, unskilled workers, poor materials.Uses process control charts.Statistical Process Control (SPC)Statistical Process Control (SPC)S6-4Produce GoodProvide ServiceStop ProcessNoYesIs process in control?Take SamplesFind Out WhyCreateControl ChartStartStatistical Process Control StepsStatistical Process Control StepsTake SampleInspect SampleS6-5Process Control ChartsProcess Control ChartsPlot of Sample Data Over Time20406080159131721TimeSample ValueUpper control limitLower control limitS6-6Process is notin control if:Sample is not between upper and lower control limits. A non-random pattern is present, even when between upper and lower control limits.Based on sample being normally distributed.Control ChartsControl ChartsS6-7Distribution of Sample MeansDistribution of Sample MeansxmeanssampleofMean=nxx==Standard deviation of the sample means(mean)x2withinfallxallof95.5%x3withinfallxallof99.7%x3x2xxx1x2x3++1+---S6-8XAs sample size gets large enough, distribution of meanvalues becomes approximately normal for any population distribution.Central Limit TheoremXCentral Limit TheoremCentral Limit TheoremS6-9ControlChartsRChartVariablesChartsAttributesChartsXChartPChartCChartContinuous Numerical DataCategorical or Discrete Numerical DataControl Chart TypesControl Chart TypesS6-10Characteristics for which you focus on defects....
View Full Document

This note was uploaded on 02/15/2012 for the course BA 252 taught by Professor Jamescampbell during the Winter '03 term at UMSL.

Page1 / 34

chapter6S - S6-1Operations Operations...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online