Inspecting Total Runout

bobdoering

Stop X-bar/R Madness!!
Trusted Information Resource
#11
Be careful with what the article is saying. The data shows it works well with a normal distribution. It cites CLT, which also presumes (although they forget to mention, as usual :rolleyes: ) that it must be from independent characteristics.

Since runout is not normal, nor are you likely sampling a population, but rather a continuous process, the caveat in their conclusion is especially meaningful:

If the underlying distribution deviates from normal distribution to a highly skewed distribution, then the accuracy of the 95% confidence statement with sample size obtained from the square root of N plus one rule decreases.
 
Elsmar Forum Sponsor
Thread starter Similar threads Forum Replies Date
optomist1 Automotive News The Cost of Inspecting In Quality IATF 16949 - Automotive Quality Systems Standard 7
O Inspecting paint and having workable standards in the supply chain Supplier Quality Assurance and other Supplier Issues 1
R Inspecting straightness tolerance of .00005" on a shaft Inspection, Prints (Drawings), Testing, Sampling and Related Topics 6
T Inspecting Full Thread Depth with a Plug Gage Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
S AS9102 FAI requirements - Inspecting with fixtures, templates AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
P Inspecting a difficult part - Measuring the centre of a hole to the edge of a rod Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
F How to convert inches to degrees - Inspecting the perpendicularity of 2 lines Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
C Inspecting a Profile Tolerance for a Die Cut Gasket Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
A Is Rework "Inspecting Quality In"? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 7
K Inspecting a Length of Weld - High Reject Rates Manufacturing and Related Processes 7
K Probe on CNC machine - Inspecting on cnc machine tools vs. CMM Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
U Which Sampling Plan should I use? Inspecting & Dimensionally Measuring Products Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
C What to look for when inspecting incoming packaging goods such as empty retail boxes Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
J Inspecting Outside Radii of a Small Steel Stamping Inspection, Prints (Drawings), Testing, Sampling and Related Topics 26
K Inspecting subcontracted manufacturing of garments, wearing apparel Manufacturing and Related Processes 5
ScottK Inspecting surface finish on SS on a piece that can't be measured with current equip. Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
A Sampling - Measuring and Inspecting a part with both Variable & Attribute Data Inspection, Prints (Drawings), Testing, Sampling and Related Topics 12
D DNV Standards for inspecting offshore containers and baskets Various Other Specifications, Standards, and related Requirements 5
Y Inspecting Glued Components - Bubble size - Medical Device Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
Y Inspecting Quality into Product - How to react? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 22
J Inspecting one at a time is quicker? Lean in Manufacturing and Service Industries 6
Claes Gefvenberg What if the inspector isn't inspecting? NASA inspector indicted Inspection, Prints (Drawings), Testing, Sampling and Related Topics 26
N Proper use of the Blueing process when inspecting the taper of bushings General Measurement Device and Calibration Topics 6
J Proper use of gauge pins - Inspecting thru holes of plastic parts General Measurement Device and Calibration Topics 19
B Total Productive Maintenance - Company Transport IATF 16949 - Automotive Quality Systems Standard 2
B Gage R&R Acceptable (10-30%), deduct Total Variation from Tolerance Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 12
J Implementation of Total Quality Management/Starting a Quality Department Reliability Analysis - Predictions, Testing and Standards 9
K IATF16949 8.5.1.5 Total Productive Maintenance IATF 16949 - Automotive Quality Systems Standard 9
B IATF 16949 Section 8.5.1.5 (Total Productive Maintenance) IATF 16949 - Automotive Quality Systems Standard 19
P Total Variation in Data - Overall Importance of the Principal Components Reliability Analysis - Predictions, Testing and Standards 1
M Total number of Requirements for ISO 9001:2008 vs. ISO 9001:2015 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 9
J One third of the total audit days on manufacturing (TS 16949) General Auditing Discussions 2
M Total Productive Maintenance vs. Lean, Six sigma, Business Process Reengineering, etc Quality Tools, Improvement and Analysis 9
F What is the scope for "Total Numbers of Employees on site" per ISO/TS 16949 ? IATF 16949 - Automotive Quality Systems Standard 4
Marc Total Lunar Eclipse Visible in North America - 15 April 2014 Coffee Break and Water Cooler Discussions 4
K Can I use ANSI/AQL for the Total Number of Containers for the entire Lot? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1
I Supplier Selection based on Total Cost question Supplier Quality Assurance and other Supplier Issues 4
B Total Resolution of an Measurement Instrument Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
D Pls hlep me understand the "Total Anaerobic Plate Count" Food Safety - ISO 22000, HACCP (21 CFR 120) 1
G How can Total Quality help a company or business compete in the world market? Preventive Action and Continuous Improvement 2
M How many documents total do you currently have? Document Control Systems, Procedures, Forms and Templates 6
5 Reasonable GRR result for a 0-1" micrometer with a total tolerance of .002" Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 16
C A total newbie to AS 9101 needs general help AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 16
B Total Productive Maintenance Templates to Drive TPM Forward Lean in Manufacturing and Service Industries 1
N Total Productive Maintenance (TPM) Portuguese Definitions and Terms Quality Tools, Improvement and Analysis 4
V Differences between Business Process Reengineering (BPR) and Total Quality Management Quality Manager and Management Related Issues 3
Z KPI Formula Issue - "Change Requests Managed" = Changed/Total ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 7
optomist1 Circular Runout vs. Total Runout Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
S Ppk & Cpk - Within Subgroup Variation is always smaller than Total Variation Capability, Accuracy and Stability - Processes, Machines, etc. 18
optomist1 Circular or Total Runout Gears and Splines? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 6

Similar threads

Top Bottom