Statistical Process Control


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Statistical Process Control

  1. 1. Welcome to this short introduction to the contents of the presentation on Statistical Process Control (SPC) This presentation provides information on • the contents of the SPC Presentation – Section A (Pgs 2 – 15) • ordering, cost & product delivery details – Section B (Pgs 16 – 19) This presentation is set to manually advance. Use arrow keys to advance or step back.
  2. 2. Section A – Statistical Process Control <ul><li>Introduction to statistics </li></ul><ul><li>Outline to the Control Chart </li></ul><ul><li>Introduction to the concept of Statistical Process Control (SPC) </li></ul><ul><li>How to create the Control Chart </li></ul><ul><li>Types of Control Chart </li></ul><ul><ul><li>Variable, Attribute , x bar, r charts, moving range, p and c charts. Shewhart, CuSum, combined Shewhart-CuSum, Exponentially weighted moving average (EWMA). </li></ul></ul><ul><ul><li>Worked examples and exercises </li></ul></ul><ul><li>Interpreting Control Charts, </li></ul><ul><li>Common and Special causes of variation </li></ul><ul><li>What are the tests for special causes of variation? </li></ul><ul><li>The relative merits of different Chart Types. </li></ul><ul><li>Process Capability. What are Cp, Cpk?  </li></ul><ul><li>What is Standard Deviation? What is Process Sigma Calculation ? </li></ul><ul><li>Gage repeatability and reproducibility </li></ul><ul><li>Scatter Diagrams </li></ul><ul><li>How do you go about implementing an effective SPC system? </li></ul><ul><li>How to perform Statistical Analysis?  </li></ul><ul><li>Advantages and Disadvantages of statistical control. </li></ul>
  3. 3. Introduction to Statistics <ul><li>Types of data: Attribute, Variable, Locational </li></ul><ul><li>Date collection guidelines </li></ul><ul><li>Collecting meaningful data </li></ul><ul><li>What is a Statistic? </li></ul><ul><li>Basic Statistical Measurements </li></ul><ul><ul><li>Mean, median, mode </li></ul></ul><ul><ul><li>Histograms </li></ul></ul><ul><li>What is meant by “stable data” </li></ul><ul><li>The Normal Distribution, the “Central Limit Theorem” </li></ul><ul><li>Variation, range, standard deviation </li></ul>
  4. 4. The Control Chart & SPC <ul><li>What is Statistical Process Control (SPC)? </li></ul><ul><li>What is a Control Chart? </li></ul><ul><li>Goals of SPC </li></ul>
  5. 5. How to create the control Chart <ul><li>What performance characteristic do you want to measure ? </li></ul><ul><li>How are you going to make the measurement? </li></ul><ul><li>What type of control chart are you going to use, Variable or Attribute ? </li></ul><ul><li>What is the sample size or sample groupings sizes? </li></ul><ul><li>How are you going to collect the data? </li></ul>
  6. 6. Types of Control Chart <ul><li>Terminology </li></ul><ul><li>Variable Control Charts </li></ul><ul><ul><li>X-Bar and R Charts (Average - Range) </li></ul></ul><ul><ul><li>MX-MR Charts (Moving Average-Moving Range) </li></ul></ul><ul><ul><li>X-MR Charts (Individual - Moving Range) </li></ul></ul><ul><ul><li>X-Bar and S Charts (Average - Standard Deviation) </li></ul></ul><ul><li>Attribute Control Charts </li></ul><ul><ul><li>p Charts (Percent Defective) </li></ul></ul><ul><ul><li>c Charts (Number of Defects) </li></ul></ul><ul><ul><li>u Charts (Defects per Unit) </li></ul></ul><ul><li>Shewhart, </li></ul><ul><li>CuSum, combined Shewhart-CuSum, </li></ul><ul><li>Exponentially weighted moving average (EWMA). </li></ul><ul><li>Selecting Rational sub-groups </li></ul><ul><li>Constructing Xbar and R charts </li></ul><ul><li>Worked examples </li></ul>Each type of chart is explained, it’s applicability and construction.
  7. 7. Interpreting Control Charts <ul><li>Zones within the Control Chart </li></ul><ul><li>Points outside the Control Limits </li></ul><ul><li>Trends </li></ul><ul><li>Runs </li></ul><ul><li>Jumps in Process levels </li></ul><ul><li>Recurring cycles </li></ul><ul><li>Lack of variability </li></ul><ul><ul><li>Potential causes and corrective actions of the above </li></ul></ul>
  8. 8. Common and special causes of variation <ul><li>Examples of common causes of variation </li></ul><ul><li>What are the standards test to identify special causes of variation </li></ul>
  9. 9. Relative merits of the various control charts <ul><li>When should you use specific types of control charts? </li></ul><ul><ul><li>What situations are most appropriate for the various type of chart </li></ul></ul><ul><li>What are the strengths and weaknesses of the various charts relative to each other? </li></ul>
  10. 10. Process Capability. What are C p and C pk ? <ul><li>Advantages of Process Capability </li></ul><ul><li>Types of Capability study </li></ul><ul><li>Preliminary capability study </li></ul><ul><li>Formulae for capability study </li></ul><ul><li>On-going studies </li></ul><ul><li>Interpreting the Capability Index </li></ul><ul><li>What to do if the process is not capable? </li></ul>
  11. 11. What is standard deviation what is process sigma calculation? <ul><li>Explanation of standard deviation, population distribution and variance. </li></ul><ul><li>Their significant in statistical process control. </li></ul><ul><li>How is the sigma performance of a process calculated? </li></ul><ul><li>What is the significance of the various sigma measures ( ie. 1 to 6 sigma) </li></ul>
  12. 12. Gage ( Gauge ) Repeatability and Reproducibility <ul><li>The role of Calibration </li></ul><ul><li>Gage accuracy, repeatability, precision </li></ul><ul><li>Gage R&R study. </li></ul><ul><li>Why perform gage studies? </li></ul><ul><li>When to perform gage studies. </li></ul><ul><li>Benefits of R&R studies. </li></ul><ul><li>How to perform a gage R&R study. </li></ul><ul><li>Calculating Repeatability and Reproducibility </li></ul><ul><li>Calculate Total Gage Variation </li></ul>
  13. 13. Scatter Diagrams <ul><li>The purpose of scatter diagrams </li></ul><ul><li>Where to use scatter diagrams. </li></ul><ul><li>How to construct </li></ul><ul><li>Interpreting scatter diagrams </li></ul>
  14. 14. How do you go about implementing an effective SPC system? <ul><li>What are the first steps in implementing SPC </li></ul><ul><li>Who needs to buy-in </li></ul><ul><li>What are the training requirements </li></ul><ul><li>How best to communicate </li></ul><ul><li>How to approach from a planning perspective. </li></ul><ul><li>How broad an approach should you take </li></ul><ul><li>Who should record the data? Who should analyse the data? </li></ul><ul><li>Can Deming be applied to SPC roll-out? </li></ul><ul><li>What obstacles can you expect to meet in implementing SPC </li></ul><ul><li>How can to overcome potential resistance to implementing SPC Control </li></ul><ul><li>How to Monitor </li></ul>
  15. 15. Advantages & Disadvantages of Statistical Control <ul><li>Statistical control is suited to particular problems, to particular forms of problem analysis </li></ul><ul><li>How to select the appropriate challenges and apply SPC </li></ul><ul><li>For various situations and for the range of control charts, what advantages will SPC control bring </li></ul><ul><li>What disadvantage are inherent in statistical control </li></ul><ul><li>How to enhance the advantages and mitigate the disadvantages. </li></ul>
  16. 16. Section B - Ordering and Cost <ul><li>Ordering: </li></ul><ul><li>Orders can be made by credit card via secure Paypal. Just go to the Order page on </li></ul><ul><li>[ ].Alternatively, you can request an invoice, again please proceed to the Order Page. </li></ul><ul><li>Cost: </li></ul><ul><li>Each presentation currently costs $49. As the product is educational & training in nature, we must insist on receipt of payment in advance of product dispatch. </li></ul>
  17. 17. Section B - Product delivery details <ul><li>Product details. </li></ul><ul><li>The product is based on a PowerPoint format, providing ease of use and immediate familiarity where you have previous use of the Microsoft PowerPoint presentation product. </li></ul><ul><li>The product consists of a prepared presentation detailing the various requirements, regulations etc, applicable to the topic in question. The presentation steps through the topics in a logical manner. Where appropriate “notes” provide additional information, to facilitate product understanding. You review the presentation by stepping through the presentation slides. The presentation remains your property and can be reused an unlimited number of times. </li></ul><ul><li>The product can be used by yourself for personal knowledge and training. You can share with your peers within your facility, again for their knowledge and understanding. You can place on a share file within your work facility. Additionally, you can use in classroom training, where you or your work peers use the slides as a basis for training presentations. </li></ul>
  18. 18. Product delivery details, continued. <ul><li>The presentation is provided via download from the website </li></ul><ul><li>[ ]. </li></ul><ul><li>The presentation is licensed for use by yourself & within your single work facility. The product is not licensed for use to share in multiple work facilities or for sharing with peers of third party organizations. In such circumstances a separate product needs to be purchased per work facility or per third party organizational facility. </li></ul><ul><li>The presentation you will receive will have two security passwords. One password will be provided separately via email to you, which will enable you to open and view the file. You may share this password with peers within your work facility. </li></ul><ul><li>A second password will remain the property of PresentationEze © . On purchasing the presentation your name or the name of your facility (whichever you prefer) will be placed onto the footer of the presentation. This name will remain permanently with the product and cannot be removed. The purpose of this latter security code is to maintain a degree of control over distribution of the product. </li></ul>
  19. 19. <ul><li>Thank you. </li></ul>