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