The Elsmar Cove Discussion Forums > Common Quality Assurance Processes and Tools > SPC Monitoring and Statistical Analysis Techniques

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1. Sampling Plan to determine sample size/frequency based on a Given Rate of Production
2. SPC for Short Runs (Control Limits) vs. Precontrol charts (Specification Limits)
3. Continous Flow (Chain) Sampling Plans
4. Interesting Web Sites, Boards & other resources on Stats
5. QS-9000 3rd Edition Acceptance Sampling - Reduces RI (Return on Investment)
6. Specifications on x & r charts - Print specifications apply to all individual parts?
7. Statistical Hypothesis Testing to prove signficant quality improvement or decline
8. Yates Algorithm as it applies to DOx or Regression
9. Capability Studies - Combining parts from two lots
10. p charts - My experience with P charting has not been good
11. Capability, FMEA and PPAP - 4.9.2 - The meaning of "high degree of capability"
12. 4.10.6.6 Laboratory Statistical Methods
13. Range - Concepts such as mean, median, mode and range
14. Control Charts for Non-Normal Distribution
15. Dimensional Characteristics Rating:Guidelines for specifying Special Characteristics?
16. Using SPC charts for Verification of Job Setups
17. Can/should SPC be used in administrative areas, purchasing, sales, planning...
18. Calculating PPM - Standard practice to calculate PPM from parts returned?
19. How does one calculate Cpm (Taguchi process capability)
20. How to implement SPC in a CNC m/c shop processing small batches of 'one timer' jobs?
21. Tips on Stat. Techniques in Bulk Material Process?Reduction of alumina to Aluminium
22. Introductory Statistics - Websites that I hope you'll find useful
23. Continuous Sampling Plan for small lot sizes: Does MIL-STD 1235B provide one?
24. DPM (Defect parts per million opportunity) vs. PPM
25. Process Capability - Long-term vs. Short-term
26. Control chart application for post heat treat processes
27. Testing for Process Confidence - Sample Size
28. Not enough discrimination? 4-digit Micrometer for .0015 Tol :burr ht of slit coils
29. Any recommendation on DOE/Statistical Analysis Software?
30. Precontrol and Process Capability - CNC Lathes that run small batches - Short Runs
31. How to calculate Average CV (Coefficient of variation) ?
32. Conflicting dimensions - Cable and wire industry and application of SPC
33. Process control - Finished product vs. Tooling
34. SPC for productivity - Monitor the productivity level?
35. Confidence intervals - Provide a point estimator?
36. How many SPC charts for Bolt Torque? 4 identical Nut/Bolts in the same part
37. Cmk calculation - Small plastic parts using injection-moulding machine
38. SPC from Each Cavity? Small Plastic Parts using Injection Molding Machine
39. Hypothesis Testing
40. Tool Wear Control Charts to Help Control Machine Tool Offsets
41. Linearity - Minimum and maximum value for acceptance of the equipment?
42. Question on how to analyze Customer Survey Results
43. Looking for Printed Control Chart blanks
44. Capability Study - Feasible? Capability Study when there is No Set Target Value
45. Capability studies with less than 125 individual samples.
46. Capability Studies - 5 different dimensions - How many parts?
47. How to build an SPC control chart in an Excel .xls spreadsheet?
48. What is Cgk? (Index of Testing Means Capability)
49. Statistical methods in ISO 9001:2000
50. Can anyone enlighten me as to what exactly Cm / Cmk are?
51. Control Charts and sample size for automatic measurement
52. Multi-Cavity Capability Studies
53. Implementation of SPC - Gears - Hobbing, shaving, grinding is 5 to 50 microns
54. SPC (minimizing defects) Vs Poka Yoke (zeroing out defects)
55. Unilateral tolerance capability assessments
56. Deming vs. Statistical Hypothesis Testing
57. Run Charts - Plots of process characteristics against time or sequence
58. SPC/Sampling on Bulk Material (Continuous Nonwoven process - total weight)
59. Strategies for reducing Sampling on incoming bulk material - low volume, ingots
60. How to make a Three Dimensional graph using Excel?
61. Skip Lot Sampling - How to Perform Skip-Lot and Chain Sampling
62. Statistically Valid Sample Sizes For SPC
63. Reactions to out of control X bar and R charts?
64. What are the accepted standard rules for SPC analysis ?(7 points rising, WECO, etc.)
65. Reducing the Number of SPC Charts used: We have many highly capable processes
66. Trying to set up a serious PPM system - Parts per Million
67. SPC - Go/No Go Sampling - Attribute Data
68. Fabric Dying - Sample Technique - Sample size to check evenness of dyeing shade?
69. AIAG SPC Manual & its benefits to Service (Healthcare) organization
70. Debalancing machine - is SPC needed?
71. Where can I find Process & Machine Capability study software?
72. Unilateral Tolerance Capability - Shaft Runout - Which capability index to use?
73. Weighting Factor for Excel
74. SPC in injection moulding and metal pressing
75. Capability Studies - Do I need to use subgroups?
76. How are the d2 values for subgroup sizes derived?
77. VisualSPC: anyone else using this software? Resistance from experienced operators
78. Converting DPMO to SIGMA - Seeking Forumula
79. Book reviews for SPC & SIGMA.
80. Sampling Plans (ISO 2859-1)(BS6001-1) - Probability of defects within a lot
81. Cmk - What is the difference between an R&R study and Cmk?
82. What is the cut off value of coeffcient of variation ( %)
83. Beyond CQE: Any suggestions to improve my knowledge further?
84. Process Capability with GD&T bonus tolerance
85. Determining Machine Capability and Process Capability of a Shaft
86. ISO 9000:2000: Question about Statistical Techniques
87. How to Determine a Machine Capability? Shaft Fit Tolerance Measurement Results
88. Machine Capability Studies: How many parts needed?
89. Customer Satisfaction Questionnaire: What Sample Size Do I Need for the Survey?
90. Calculating DPMO for Exponential Distributions
91. MTTR - Quick and dirty way to calculate Mean Time To Repair - Solenoid valves
92. Unbiased Estimators for Sigma? Is 's' an alternative to RBar/d2?
93. Industry DPMO Standards - Contract Electronics Manufacturing processes
94. Valid study for CO samples both Analyzer and Drager Tube results?
95. Cmk is defined as a capability index for a stable machine
96. Poisson & Bi-Nomial Distributions: What's the difference? When to use?
97. Control Plans - Is it acceptable to put n/a's on a Control Plan where data is taken?
98. Sampling Plan (ANSI/ASQC Z1.4) - Can anyone tell me how it is made?
99. Non-normal Distributions in SPC - How do I Normalize Data?
100. Failure Reporting
101. Stastistical Techniques in Chemical Industry
102. Template for Capability Study
103. Johnson's Transformation Distribution Model
104. Out of Control patterns for non-normal distributions
105. Assessments of Normal Distribution - Formulae for CHI squared, Kurtosis and Skew
106. Control limit - How is table for x-bar & R control chart derived?
107. What frequency and sample size is 'normal' for SPC?
108. Target Magazine - A publication of the Association for Manufacturing Excellence
109. Seeking: Information on ISO 11462-1:2001
110. Cpm versus sample size
111. Help with Coefficient of Variation
112. Short Run SPC with Tool Wear
113. Western Electric Statistical Quality Control Handbook
114. Table of Constants for Control Charts
115. How to deal with nonrandom samples?
116. Real World Usage Profile
117. Statistical Analysis applications in Human Resources
118. Normality Assumption - Most Tests 'Assume' a Normal Distribution - t test statistic
119. Changing specification limitation limits - What effect on Process Capability
120. Statistically Determining how many Tests to conduct.
121. How to calculate a True Position toleranced at MMC - Capability of True Position
122. Control Limits - Can't be smaller than 3 times your measurement increment?
123. Sample Size and Frequency - In-process monitoring in a mass production shop
124. Initial Process Studies - Number of samples - 100 for Individuals Chart?
125. Data Management - Quantity of digitally captured data
126. Non-normal Distributions in Statistical Process Control
127. Capability Study - Making wine bottle corks - Length
128. SPC Program Demo
129. Help With A Statistical Problem
130. Probability of Defects - A Problem
131. DPMO (Defects Per Million Opportunities) Calculation
132. Sample Sizes and A2, A3, B4, d2 Factor Parameters
133. How to assess Process Capability for parallelism
134. Herramientas estadísticas
135. CNC Machining Operations Sampliing Plan
136. Black Belt Training - My current BB journey
137. Multidimensional Scaling
138. Statistical Process Control - ISO 11462-2:2001 Key elements of an SPC System
139. What type of control chart...
140. Bootstraping and Resampling Statistics - Capability for non-normal variable data
141. Empezando con SPC
142. Statistical Tools outside of SPC
143. empezando con SPC
144. PPM - Determining Parts Per Million to measure our incoming goods rejections
145. Should I use Xbar-R chart?
146. Comparison of two test equipments
147. BSR/ISO/ASQ S11462-1-2001
148. Has anyone implemented SPC in the Laboratory Testing/Service Industry
149. How to Calculate Z Score Values
150. SPC Control Limits Review Frequency
151. PCB (Printed Circuit Board) Assembly - Wave Solder Capability
152. SPC training games - Basic training for manufacturing shop-floor guys and engineers
153. Multi Cavity Sampling Plan - MSPs (Multi-Stream Processes)
154. Statistical Tolerancing - Monte Carlo simulation in Statistical Tolerancing
155. Capability - Process vs Product - Look at process characteristics to improve product?
156. Attribute Control Chart Question - I plan to use to np chart
157. Cgk - The Kolmogoroff Method
158. Fast Runs - Four lots, one day each, every month - What chart to use?
159. Geometric Tolerancing and SPC - Calculating position upper and lower control limits
160. Creating Internal customers within the manufacturing process
161. Short run SPC Seminars?
162. Flow Solder Control Chart - I believe I need an Xm-R chart
163. Opening Design Limits to Accomodate Process Capability
164. How can I do the Red Bead Experiment? Hotel Industry
165. ISO 11462-1 Guidelines for implementation of Statistical Process Control (SPC)
166. Metrics to monitor process improvement
167. SMT (Surface Mount Technology) Sampling Plan in a SMT & COB Assembly Company
168. Seeking Help: Design of Experiments - DOE
169. Statistical Measures of Complaints
170. Master Black Belt vs MS Applied Statistics
171. What are the Odds of That - About coincidence
172. Moving Range charts and capability?
173. How can I determine the kind of distribution - What about Bionimal or Poisson?
174. Non-Normal Data - Transforming the Data to Normal
175. Statistics to define the capability of operator controlled manual machines
176. What are Process Capability and Process Stability?
177. Seeking: Links or materials about Shainan techniques
178. Case studies where Monte Carlo Simulation applied to Maintenance, uptime prediction
179. SPC tools for wall thickness and weight - Suggestions?
180. Electronically Challenged
181. Precision of tolerance - Test validation
182. Unilateral / Bilateral Tolerances for dimensions with Double Plus or Minus Tolerance
183. Seeking: Control Charts - Xbar R control chart
184. Understanding PPM accuracy on a Laser Tracker
185. Understanding Calibration Results on CMM Reports
186. SPC for Improvement? (was PreControl) SPC is great for stability!
187. Which SPC Chart should I use? XbarR, Range, XmR, p, np, c, u, Zero Mean?
188. Complaints Response Times
189. Short Run Capability - Batch quantity is 15,000 to 20,000
190. What is Statistical Tolerancing? How to apply it to a product?
191. Minimum number of Subgroups to assess Process Capability
192. Does the data in a control chart have to be normally distributed?
193. Control Chart Rules - Trend and Statistics Explainations
194. Normal Distribution - How do I test for normality? All the data or just the averages?
195. Statistical technique sought for predicting replacement of perishable tooling
196. Capability - How to calculate Capability Indices for Non-normal Distributions
197. When is a process considered to be capable?
198. Demonstrating Capability in 'Goalpost' World
199. Surveys: Number of Responses
200. Internal Calibration Laboratory Requirements - Ambient temperature, Humidity, Etc.
201. Button Test - Tactility Criteria
202. MTBF (Mean Time Between Failures) - Seeking help
203. ISO 16269-7 Statistical interpretation of data
204. How can I start explaining and training SPC in my company?
205. Skip-lot testing and the FDA
206. Empirical Study on Canadian Companies
207. Sample Size Calculation for PPM (Parts Per Million) Prediction
208. SPC Help - Probability of SL=CL
209. Looking for Quality Games - Manufacturing environment
210. Standard or a Good Rule of Thumb for Finding Part Weight
211. Calculating Process Average Targets for LSL (Lower Specification Limit) Only
212. Statistics for Dummies - Book, class, or tutorial to help me understand
213. Control charts to trend data for multiple dependent variables? Hotelling's T^2 stat
214. Modified Control Limits - Process that has points out of control
215. Pre-control Software
216. Machine Capability Studies on CNC Lathes
217. 76/211/EEC 2.3.3.1 Criteria for Non-Destructive Testing
218. Calculating Manufacturing efficiencies
219. Failure Mode SPC
220. How To Use A Control Chart
221. Acceptable Outgoing Quality Level (AOQL) aka Acceptable Outgoing Quality (AOQ)
222. Statistical basis for square-root sampling
223. Grubbs test to determine one outlier to normalize data
224. Using SPC for DOE - Just Curious
225. Simple Probability Statistics - Assembly Failure - Binomial Equations
226. AIAG Statistical Process Control (SPC) Manual - Page 81
227. SPC on Multiple Cavities - Customer wants SPC done on each notch - Cylindrical part
228. Seeking: Simple Excel .xls SPC spreadsheet
229. Multivariable Control Chart - Target, Short Run, Group charts, T2, etc.
230. Calculating PPM for Customers - Is this fudging PPM #'s?
231. Pre-Control Chart - Limits are set at 2/3 of the specification
232. T tests - To test for central measure (means) - Steel supplier
233. Where to find a good "STATISTICAL" and/or a good "GD&T" font for windows?
234. Multi-vari analysis - Core diameter oversize
235. Portable SPC Data Collectors and Industrial 'Hardened' Computers
236. Great NIST Stats Reference
237. Seeking: Origin and History of PPM (Parts Per million)
238. How to count the UCL for MEWMA (Multivariate Exponentially Weighted Moving Average)
239. Antiquated Sampling Standards? Scrap paper tables like Z1.4 or MIL-STD-105E?
240. Capability Calculations: Non-Normal Distributions and One Sided Distributions
241. Position Deviation: Is it a Dependent or Independent Variable?
242. Table for converting Cp values into corresponding Capability %
243. DOE (Design of Experiments) Help: Montgomery's Industrial Engineering book
244. How to make use of data captured in an ATE tester
245. Defining Pre-Control Zones - Statistical Process Control (SPC)
246. Standard Deviation - Process Output is Stable and Normally Distributed
247. Measuring Daily Cycle Counting Inventory Accuracy
248. Confidence Interval Question - The calculations ASSUME you know the true population
249. How many attribute samples from a lot with zero defects?
250. Validation question - When our maintaince department adjusts a station or machine