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View Full Version : SPC Monitoring and Statistical Analysis Techniques

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  1. Is there any way to prove a process is in control other than with a control chart?
  2. Does anyone use Median Charts instead of Xbar & R charts?
  3. SPC charts with Fixed Control Limits? Seam width and stitches per inch
  4. SPC control for one-sided specification
  5. Safety Characteristics & capability studies
  6. Control of a process that runs in multiple locations
  7. Key Performance Index (KPI) in a restaurant!
  8. Weibull vs. Gaussian on something that is not a durability or life cycle test
  9. SPC and Acceptance Sampling - Is Acceptance Sampling Obsolete?
  10. Documenting Reaction to Out Of Control Situations
  11. When or how often should we update SPC (UCL and LCL) Control Limits? Every month?
  12. SPC Software Validation Required by our Registrar - How do we do this?
  13. Complaints Management System - Restaurant chain business - Study case
  14. SPC for calibration check data? Daily gram scales check - What is acceptable?
  15. Looking for Process Monitoring /SPC Package - Molded pharma packaging
  16. U-chart regarding defect count - The operator as subgroup?
  17. SPC in Spring Brakes - Measuring Angles - What do I need to do?
  18. Help on identifying the correct statistical tool - Defects vs. Total products
  19. How to conduct machine capability (Cmk) study?
  20. How To Conduct Machine Capability Of An Electrical Discharge Machining (edm)?
  21. Criteria in Process Control: No Control Charts
  22. Beginning SPC data collection: Metal Stamping Company - Need some advice
  23. Decreasing our Ppm! Important and effective point to decrease ppm level
  24. Real Time SPC Values: Problem with Capability indices
  25. Basic Need:Initial Capability Study:No critical characteristic on print
  26. How to measure Process Capability ( Cp and Cpk)
  27. Skewed data analysis - Insertion force test
  28. SPC for hole size taking into account punch wear
  29. Reporting metrics for tier 2 automotive paint facility
  30. SPC Techniques - Low volume environment - What can be applied?
  31. How do we use SPC or other stat tools to decide product spec?
  32. U-Chart? Product is a temperature sensor
  33. How To Read OC Curves for Individual sampling plans in Z1.4 2003
  34. Monitoring & Measuring Software confirmation (validation) - TS 16949 Section 7.6
  35. Seeking Military Standards Table
  36. Sampling Questions - Theory behind the use of sampling techniques
  37. Calculation of capability of a minimum requirement with no found maximum
  38. Continuous Sampling Plan CSP-1 aka MIL STD 1235C
  39. AIAG SPC Manual - Is the Control Chart in Appendix I wrong?
  40. I am confused, which Cmk value should I take and use?
  41. Short run Z-bar & W charts - Can anyone tell me the formula used?
  42. Are Difference-bar & R appropriate for drift check for working standards?
  43. Hypothsis test - Problem with an in-process test machine - Almost identical product
  44. How Can I Estimate Cp?
  45. Capability for small number of parts process - Seeking free tool(s)
  46. Where to find an acceptance sampling excel macro or .xls template?
  47. Using Control charts on shopfloor filled by operators
  48. What are BBP,CTs,YTD perf?
  49. X-R chart - Suitable with method? Tubes and hoses - ID
  50. Example of Format for SPC Audit - Measurement and analysis at each process step
  51. Should we monitor all Significant part Characteristics with SPC? Low Volume CNC
  52. Statistics Guru? What method is appropriate to calculate the answer
  53. A few statistics problems that I don't have solutions for
  54. Help Interpreting "Variable Tolerance Limit" - MMC Modifiers - Geometric Tolerance
  55. Good Statistics Calculator for ASQ Certification Exams
  56. Calculating Capability-Subtract Gauge R & R Error?
  57. Data logging software for Palm powered PDA required
  58. Still Struggling.... Control chart practice problems for the CQT
  59. Process Capability - TS 16949 8.2.3.1 - How to measure for various processes?
  60. Layman's Learning Tool Needed - Regression analysis, t-tests, chi-square tests, etc.
  61. Design of Experiments - Variance in lathe process
  62. Capability from a low number samples - FIAT standard
  63. SPC for One-sided Specification - Setting the Lower Control Limit
  64. Seeking: X bar R chart software - Or how to do one in Excel
  65. How do I use SPC in Batch Production?
  66. How do I construct a control chart that shows a changing average?
  67. How long (how often) do you check your SPC chart?
  68. Hypergeometric Distribution - Help needed to understand
  69. Control Limits vs. Confidence Intervals - What range can we be 95% confident?
  70. Seeking: OC curve for CSP-1,CSP-2 and CSP-3 software - Or how to do one in Excel
  71. Computer usage in statistical calculation & inspection activities
  72. Is X-Ray Data Variable or Attribute? How to do a capability study?
  73. Automotive SPC Requirements - Small batch sizes of around 1000 - 5000 parts
  74. I would like to trade a SPC software
  75. Help me figure out the Prediction Interval Equation
  76. Modeling and Analysis of Semiconductor Manufacturing (MASM) Conference
  77. Formulas for calculating control chart constants
  78. Web based SPC Analysis using PHP
  79. Control chart limit calculation confusion concerning SPC control limit calculation
  80. The Numeracy Piece - Word is new to me, does anyone know about it?
  81. Attribute vs. Variables Data - Variable data preferred over Attribute - Auto Industry
  82. COPQ measurements in Telecom Industry: Help Needed
  83. How to perform a capability study from 48 pcs? CNC Lathe and Sample Size
  84. SPC (Statistical Process Control) Overview
  85. ISO 9001:2000 - SPC (Statistical Process Control) requirements
  86. Defining what Statistical Tools are - Is a Check Sheet a Statistical Tool?
  87. SPC charts - Sample Size discussion
  88. Action on processes that are not capable
  89. Acceptance criteria for Cmk (machine capability index)
  90. Help !! Problem of SPC on continuous variable
  91. Plans for DoE-optimization
  92. What SPC method that I've must to control characteristic tensile strength?
  93. AIAG's SPC manual 2nd edition vs. 1st edition - Has it changed?
  94. Software Defect Analysis Tool
  95. ppm by weight
  96. AIAG Releases the 2nd Edition of their SPC (Statistical Process Control) Manual
  97. Tool Approval Process - Should we be using Cmk for tool validation
  98. CUSUM Chart - Can some one throw some light on use and how to interpret?
  99. Help me make a normal bell curve on my histogram
  100. Statistical Techniques Measureables for Application Development Company
  101. Monitoring Response times for a call centre support group
  102. Least count thumb rule - Stone walling SPC
  103. The right way of doing regression? True or lies or True lies or Lies True? ! ?
  104. Optimizing Multiple Response Variables Using Taguchi Signal-to-Noise ratios
  105. C=O puzzle - What protection does C=0 provide a supplier?
  106. Validation of statistical software - To validate a CAQ-Statistic-Package
  107. Every problem in world has linear regression equation ?!!??
  108. What type of control chart should I use?
  109. AIAG SPC Second Edition Reference Manual Now Released
  110. What statistical method to establish a specification?
  111. Removing the effect of special causes on Xbar-R chart - Centerless grinding process
  112. Simple assembly service - How could we do process study? Attribute data
  113. What to do if your study shows the machine isn't capable?
  114. What are the general rules / guidelines when doing a machine capability study?
  115. Seeking guidance documents for Non FDA Regulated Process Validation - New Equipment
  116. Control charts for attributes: is this possible on a non automated job?
  117. What is an I-Chart? An Individuals Control Chart?
  118. Control charts - Seeking known data set to confirm my software
  119. X bar R chart - Bushing reaming ID - 7 points above or below the center line
  120. Moving all of our SPC charts to an Electronic System - Software to flag OOC Condition
  121. Calculating B(n) values for X_Bar & S Charts
  122. Difference between SPC (process control) and SQC (quality control)
  123. AIAG's SPC manual 2nd edition - Page 189 - Process Capability Formula error?
  124. Calculating Savings from Standard Deviation when Mean remains constant and SD changes
  125. CCp : Composite Cp. A new star born (?!)
  126. Setting Control Limits - SPC for one sided dimensions
  127. Ridppm? Fdppm? Does anyone know what these are?
  128. Fitted line plot and Regression : The final conflict
  129. Control Chart Interpretation - General "Rules"
  130. Individual or Moving Range Chart? Parts run in lots of 7 with 4 key wall thicknesses
  131. Why the tight control limits? Histogram of the data is slightly skewed to the left
  132. Calculating Tolerance with One Sided Limits - Need a Form to Calculate
  133. What is a good measurement quantity for Cp?
  134. Please Help Me To Refer Few Site On Process Capability
  135. t2 Hotelling or Chi square Control Charts - How is done - Calculus and charting?
  136. SPC in job shop? CNC machine producing a max of 50 pieces per job
  137. Deming award requirement? Control charts manually updated and not on PC?
  138. Multiple regression questions
  139. Average and range control chart - Averaging Multi Spindles (6 cutting heads)
  140. P Chart Question - Defects per Plate
  141. P-Chart Question - Need Guidance - 100% inspection of all product parts required?
  142. Control charts where the center line is a trend or slope?
  143. SPC (Statistical Process Control) for Management Reports
  144. How to calculate coefficeints of X's in multiple variable regression equation
  145. SPEC, according to Honda, it's meaning? Sourcing QAV Evaluation Form
  146. Looking for information on U-Charts - Semi-conductor equipment manufacturer
  147. Precontrol - What if two points are exactly on the limit?
  148. Normal vs. When a Between / Within Capability analysis should be used?
  149. Is the economy "out of control" -- economics & SPC
  150. SPC and Injection Moulding
  151. Is it Time for New Rules for SPC (Statistical Process Control)?
  152. Incorporating Uncertainties in the observed responses during a Calibration
  153. Control chart - Sequence of sampling is not in accordance with production sequence
  154. I need help verifying formula's in a database for LCL UCL Cp Cpk PPk
  155. Setting Manufacturing Yield Targets using regression analysis
  156. What distribution should I expect a tensile strength test to fit?
  157. Using Statistics for corrective action verification activities
  158. Inspection Plan for receiving finished products
  159. How to figure the total number of defects for a population - Statistical question
  160. Capability Indexes for ISO/TS16949 - Cpk & Ppk after PPAP
  161. Does Cpk analysis make sense on this study? Number of packaged parts per bundle
  162. Help me to calculate the yield and process quality in terms of the dpmu
  163. Statistical techniques for determining which factors are affecting the yield?
  164. Non-Symmetrical Tolerance Intervals for setting uncentered process specifications
  165. Position defect - Use the modal class with the Rayleigh law instead of the meaning
  166. Analyzing Data with a Non-Normal distribution
  167. SPC Rules Question for Moving Range chart
  168. Has Someone Stolen our Birthdays?
  169. Validation of Cpk and Ppk calculations - Sheet to check Cpk and Ppk values
  170. Cpk for attribute data? Performing SPC on capacitors - Capacitance measurement
  171. Western Electric Company (WECO) Rules - How many are there?
  172. Iso/tc69/sc4/wg6n48 - Does anybody here know captioned standard?
  173. Is there a process shift and/or trend in the attached control chart?
  174. Operating characteristics for S chart
  175. AIAG SPC and MSA guidelines - Which are the latest revisions?
  176. Formulas for X bar & R Chart with one sample size
  177. Does ISO 9001 or TS 16949 have any requirement like 777 rules for control charts?
  178. When should we use SPC? Manufacturing Frame and Pressed Part
  179. Tolerance Limit Constants - Calculating tolerance limits using JMP
  180. The AIAG's SPC manual 1st Edition and 2nd Edition - Differences?
  181. SPC in Food Chain Restaurant Complaints
  182. Square Root of n+1 Question
  183. Applicability of P Chart & U Chart - After encoding data I get no reading
  184. Which Control Chart to Use
  185. Unidentifiable distributions? 2 sets of data - p Value less than 0.05
  186. Statistically Toleranced Drawing Feature Dimensions - Target Value and Range
  187. Verifying improvement results - Indication that controls have worked
  188. SPC Monitoring on critical dimensions
  189. How many charts we need? Different sizes of part produced in the same line
  190. Cpk = 1.33 if control limits are +/- 3 sigma - True?
  191. Control charts for non-normal distributions - Do I need to do anything special?
  192. Statistical Analysis for Sales Process? Can you help?
  193. Fractional factorials for more than two levels, none continuous response
  194. Charting, non SC / CC / FF characteristics
  195. Ppk/Cpk value with 1-sided specification - Only given a lower specification
  196. When SPC can be prejudicial?
  197. Process Change - Proof of Transparency
  198. Unilateral characteristics - What capability indicators should we calculate?
  199. SPC on parallelism to the runout of a counterbore feature
  200. QI Analyst - Is anyone is still using version 2.0.1?
  201. Relationship between ANOVA and measurement accuracy - Mechanical strenth of a closure
  202. t-test or ANOVA to compare variance of several samples series
  203. Lot Reject Rate - The use of ppm vs. % (per cent)
  204. Statistical Technique(s) for Measuring Software Performance
  205. Fit a distribution
  206. Initial Capability study on N50 parts - Subgroup Size?
  207. Mathematical difference between mean Deviation and Standard Deviation
  208. Warping / Flatness SPC - X bar-R chart - Control is Max 0.15
  209. Formulas and Constants - Control Limits for Individual and Moving Range Control Chart
  210. Whats the rationale for a Sample size of 30 for Capability Analysis?
  211. U-chart Sanity/File Review - Is the chart constructed properly?
  212. Attribute Gage R&R Basis for Applications - Personal Perception Criteria
  213. SPC - The Evolution of SPC
  214. Capability of Inherently Non-Normal Process - Plating Process Thickness Distribution
  215. Xbar-R chart question - Wire Pull Test - Different Wire Sizes
  216. S-Square Control Chart - Is anyone familiar with the S-Square Control Chart method?
  217. How to Add Two Sigmas from Two Populations?
  218. Calculating PPM for a Supplier on a Specific Defect - Excel .xls Spreadsheet Wanted
  219. SPC for Positional Tolerance
  220. Cumulative Count of Conforming Control Chart (CCC) - Calculating UCL and LCL
  221. Optimally Selecting 30 Pieces of Product out of 34 - How do I?
  222. Normality Test Before the Xbar R Diagram is Made?
  223. Help on Rational Subgrouping: How to Subgroup Data given...
  224. Statistics Sampling
  225. Correlation of two tests that are NOT linearly correlated?
  226. X bar & R Chart Result - Analysis of the Graph
  227. The Correct Process Control Chart for Furnace Temperatures
  228. Format for presenting capability study results?
  229. New(?) kind of control Chart? Pre-Control Chart
  230. Is there an ERRATA for the AIAG SPC Manual 2nd Edition? Error in u-chart formulas?
  231. Errors in the AIAG's SPC manual? Need help reviewing charts.
  232. Correlation or Hypothesis Test? Which is approprite to use on what kind of problem?
  233. Probability Question - Population of x number of 'different' items
  234. How to Calculate UCL (Upper Control Limit) & LCL (Lower Control Limit) & CL?
  235. Capability study on true position callout. What would be the upper and lower spec?
  236. How to Calculate the Area under the Normal Distribution Curve
  237. Monitoring Number of Incomplete Items & p-chart - Medical Records
  238. One sided Control Chart with only UCL or LCL
  239. Use of Non-Parametric Statistics and Non-Normal Data
  240. Subgroup Size for Control Limit Calculations - SPC
  241. Is there a control chart for non-independent data
  242. Calculation of UCL and LCL for SPC charts (Xbar-s) with sub-group sample of 32 pcs.
  243. Formula for I Control Chart Limits - Different values for E2 constant of IMR?
  244. Monitoring the Use of Blood and Blood Products - Meeting the JCI Standards
  245. Is there a Control Chart for Very Low Counts?
  246. DPPM vs. AQL - What is the difference between DPPM and AQL?
  247. x-BAR, p or U chart? Plastics compounding line
  248. Monitoring Temperature in Medication Refrigerators - What will Cpk showing us?
  249. What is the minimum number of values to develop individual chart?
  250. Ship to Stock program - How to implement Ship-to-Stock Program effectively?