OCN Level 2 in SPC

Causes of Variation

Causes of Variation

◄ Deming in Japan

Jump to... Jump to... Beadboard Beadboard Help Variation What is a Process? Process Improvement Satistical Process Control (SPC) Defect Detection (1) Defect Detection (2) Defect Prevention Common Causes of Variation Special Causes of Variation Variation Example (1) Variation Example (2) Variation Example (3) Variation Example (4) Variation Example (5) Causes of Variation Monitoring Variaton What is SPC? The Specifications Approach to Variation The Test / Rework / Scrap Cycle 100% Inspection is Not Enough Results Measures vs. Process Measures Statistical Process Control is... Monitoring the Process Control Limits Using Graphs Interpreting the Data (1) Interpreting the Data (2) Interpreting the Data (3) The History of SPC Controlled & Uncontrolled Variation (1) Controlled & Uncontrolled Variation (2) Control Charts Dr. Deming Deming in Japan Special Causes of Variation SPC is Not Restricted to Manufacturing Statistics in SPC Probability Theory Inspection Inspection (2) Sampling Probability Theory (2) Sampling (2) Variable Data Attribute Data Frequency of Samples Samples only provide estimates Normal Distribution Normal Distribution (2) Standard Deviation The Empirical Rule Empirical Rule Demonstration (1) Empirical Rule Demonstration (2) Empirical Rule Demonstration (3) Empirical Rule Demonstration (4) Empirical Rule Demonstration (5) Empirical Rule Demonstration (6) Empirical Rule Demonstration (7) Control Limits Control Charts Introduction to Control Charts Process Control Charts Interpreting Data from a Table Interpreting Data from a Run Chart The Voice of the Process Control Limits Types of Control Chart Variable Data Attribute Data Attribute Data (2) Variable Charts Attribute Charts Analysis & Interpretation So We've Got These Control Charts... ...But What Do They Show Us? Variability during Statistical Control Highlighting Special Causes Is the Process in Statistical Control? Points Outside the Control Limits Other Indications of Special Causes Trends Runs Non-Random Patterns Introduction to Capability Some Useful Terms Capability Studies Capability Indices Safety Margins Cp Calculating Cp Cpk Calculating Cpk Introduction to Mean & Range Charts What is the Mean & Range Chart? Anatomy of a Mean and Range Chart Alternative Layout for a Mean & Range Chart How to Plot Mean & Range Charts Sample Mean and Range Chart Control Limits Chart Plotting Exercise (1) Chart Plotting Exercise (2) Chart Plotting Exercise (3) Chart Plotting Exercise (4) Chart Plotting Exercise (5) Chart Plotting Exercise (6) Chart Plotting Exercise (7) Chart Plotting Exercise (8) Chart Plotting Exercise (9) What to Do with a Mean & Range Chart Summary How to Prepare a Mean & Range Chart First Steps in Preparing a Mean & Range Chart Chart Preparation Exercise (1) Chart Preparation Exercise (2) Chart Preparation Exercise (3) Chart Preparation Excercise (4) Chart Preparation Excercise (5) Chart Preparation Excercise (6) Chart Preparation Excercise (7) Chart Preparation Excercise (8) Chart Preparation Excercise (9) Chart Preparation Excercise (10) Chart Preparation Excercise (11) Chart Preparation Excercise (12) Chart Preparation Excercise (13) Chart Preparation Excercise (14) Capability Capability Exercise (1) Capability Exercise (2) Capability Exercise (3) Capability Exercise (4) Capability Exercise (5) Cp & Cpk Capability Exercise (6) Capability Exercise (7) Capability Exercise (8) Capability Exercise (9) Introduction to Individual & Moving Range (XmR) Charts When to use an XmR Chart The Anatomy of an XmR Chart How to Plot XmR Charts The Project Information in the Chart Headings The Three Graphs The Data Collection Areas Chart Plotting Exercise (1) Chart Plotting Exercise (2) Chart Plotting Exercise (3) Chart Plotting Exercise (4) Chart Plotting Exercise (5) Chart Plotting Exercise (6) Chart Plotting Exercise (7) Chart Plotting Exercise (8) Chart Plotting Exercise (9) Chart Plotting Exercise (10) Chart Plotting Exercise (11) Chart Plotting Exercise (12) Chart Plotting Exercise (13) Chart Plotting Exercise (14) Chart Plotting Exercise (15) Summary How to Prepare an XmR Chart Chart Preparation Exercise (1) Chart Preparation Exercise (2) Chart Preparation Exercise (3) Chart Preparation Exercise (4) Chart Preparation Exercise (5) Chart Preparation Exercise (6) Chart Preparation Exercise (7) Chart Preparation Exercise (8) Chart Preparation Exercise (9) Chart Preparation Exercise (10) Chart Preparation Exercise (11) Chart Preparation Exercise (12) Chart Preparation Exercise (13) Capability Capability Exercise (1) Capability Exercise (2) Capability Exercise (3) Capability Exercise (4) Cp vs. Cpk Capability Exercise (4) Capability Exercise (5) Capability Exercise (6) Capability Exercise (6) Introduction to Number of Defects per Unit (u) Charts What is a u-Chart? What kind of data is recorded on a u-Chart? But what about the Control Limits? Defects and Defectives Problems with Attribute Data Anatomy of a u-Chart How to plot a Number of Defects per Unit (u) Chart Control Limits on a u-Chart Chart Plotting Exercise (1) Chart Plotting Exercise (2) Chart Plotting Exercise (3) Chart Plotting Exercise (4) Chart Plotting Exercise (5) Chart Plotting Exercise (6) Chart Plotting Exercise (7) Chart Plotting Exercise (8) Chart Plotting Exercise (9) Chart Plotting Exercise (10) Chart Plotting Exercise (11) Chart Plotting Exercise (12) Chart Plotting Exercise (14) Summary How to Prepare a u-Chart Calculating Control Limits Chart Preparation Exercise (1) Chart Preparation Exercise (2) Chart Preparation Exercise (3) Chart Preparation Exercise (4) Chart Preparation Exercise (5) Chart Preparation Exercise (6) Chart Preparation Exercise (7) Chart Preparation Exercise (8) Chart Preparation Exercise (9) Chart Preparation Exercise (10) Chart Preparation Exercise (11) Chart Preparation Exercise (12) Presenting Data Presenting Data Example Run Charts Run Charts (2) Presenting Data In Context Presenting Data Graphically Tally Charts Tally Charts (2) Tally Charts (3) Tally Charts (4) Tally Charts (5) Tally Charts(6) Histograms Histograms (2) Histograms (3) Histograms (4) Faults Pareto Charts Ogives Ogives (2) Ogives (3) Ogives (4) Summary Pareto Analysis Who was Pareto, and what is his Principle? The Structure of a Pareto Chart Gathering Data Pareto Analysis Exercise (1) Pareto Analysis Exercise (2) Pareto Analysis Exercise (3) Pareto Analysis Exercise (4) Pareto Anlysis Exercise (5) Pareto Analysis Exercise (6) Pareto Analysis Exercise (7) Pareto Analysis Exercise (8) Pareto Analysis Exercise (9) Pareto Anlysis Exercise (10) Pareto Analysis Exercise (11) Pareto Analysis Exercise (12) Pareto Analysis Exercise (13)

Special Causes of Variation ►