Measure Twice, Cut Once: The French Railroad Snafu

Elsmar Forum Sponsor

David-D

Involved In Discussions
#3
I don't want to be too flippant and I'm sure that many will (rightfully) delve into a failure of requirements analysis but I don't really know that this is a bad thing. Basically for less than 2% of the project cost they need to address issues with less than 1/6 of the infrastructure. In exchange it removes a significant, artificial constraint which likely restricts passenger carrying capability and comfort and possibly allows for using more standard components and resulting cost savings. In the end, possibly a much better design solution; possibly with lifecycle cost savings.

But it makes a flashy headline.

David
 

Jim Wynne

Staff member
Admin
#5
I don't want to be too flippant and I'm sure that many will (rightfully) delve into a failure of requirements analysis but I don't really know that this is a bad thing. Basically for less than 2% of the project cost they need to address issues with less than 1/6 of the infrastructure. In exchange it removes a significant, artificial constraint which likely restricts passenger carrying capability and comfort and possibly allows for using more standard components and resulting cost savings. In the end, possibly a much better design solution; possibly with lifecycle cost savings.

But it makes a flashy headline.

David
I think that calling what amounts to corrective action a "design solution" is a bit misguided. My guess is that had this information been available beforehand when the train was being designed, the solution would have been the same, but who knows?
 

TPMB4

Quite Involved in Discussions
#8
So the solution is to make the station platforms smaller so the trains can get through. Now are they replacing the whole of the regional fleet with these trains? If not then there could be remaining train stock in use at the previous width. Would this not create a wider gap and potential for safety implications?

Someone said it is 10cm on each side, not a big gap but some users might have problems,disabled,mothers with pushchairs, cyclists with luggage on the bikes (or in my partners case a toddler in a child seat). Trust me a modest gap presents a bit of difficulty with a toddler on the back of a bike I've experienced that as our local station has a large gap if the train stops early due to the station's bend.

My point is by solving the current problem in the front of their mind they might create another one. Have they considered this or missed this like the train width limit in certain stations? Another service pack update (SP2) might be needed - using the M<S analogy.
 
Last edited:

hogheavenfarm

Quite Involved in Discussions
#9
This has happened here in the US in the last few years as well.It occurs mainly when replacement parts are ordered (usually not from the OEM), and the supplier is not given the envelope dimensions that constrain the exterior width.
 
K

kgott

#10
Reminds me of the apprentice carpenter who was looking befuddled to the master carpenter so the master approached the apprentice and asked what was wrong.

The apprentice replied, I measured it twice and cut it once but it was too short so I cut it again and it's still too short.
 
Thread starter Similar threads Forum Replies Date
M How to measure a plastic cap General Measurement Device and Calibration Topics 18
C First Article Inspections - 'how to measure' General Measurement Device and Calibration Topics 11
lanley liao Question regarding the calibration of monitoring and measure equipment. Oil and Gas Industry Standards and Regulations 0
J Should a Class 1 medical device with an option to measure body weight be considered Class 1m? EU Medical Device Regulations 0
M Gage R&R and right way to measure Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 16
P How to measure DPPM in Chemical batch manufacturing Quality Tools, Improvement and Analysis 1
silentmonkey How to measure severity if my product is designed for emergency use and failure would result in death? ISO 14971 - Medical Device Risk Management 9
A Looking for a third party to calibrate our measure equipment - South Carolina General Measurement Device and Calibration Topics 6
J Validity / outcomes measure for custom made medical device ISO 13485:2016 - Medical Device Quality Management Systems 2
D Performance specification as a Risk Control Measure, EN 14971 ISO 14971 - Medical Device Risk Management 7
J KPIs or Metrics to Measure a New Complaint Handling Process 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 9
D Torque fractional unit of measure; cN-m or N-cm? General Measurement Device and Calibration Topics 2
qualprod ISO 9001 5.1.1 - How to measure System effectiveness ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 4
J How to measure a Critical Characteristic that is a Basic Dimension Misc. Quality Assurance and Business Systems Related Topics 6
I Can we use pin gauges to measure an accurate Cpk ? Capability, Accuracy and Stability - Processes, Machines, etc. 9
qualprod Best criteria to measure Corrective Action effectiveness - Poor Maintenance ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 10
1 How to measure straightness on a HEX Long Bar Manufacturing and Related Processes 7
Ron Rompen Measurement Method Challenge - Measure feature #91 Inspection, Prints (Drawings), Testing, Sampling and Related Topics 9
G Measure 3 times, for calibration report? Customer Owned Reference Standard General Measurement Device and Calibration Topics 4
M Informational The ANSM decides, as a precautionary measure, to withdraw from the market macrotextured breast implants and breast implants with polyurethane-coated s Medical Device and FDA Regulations and Standards News 0
M Informational Health Canada advises Allergan of its intent to suspend its licences for Biocell breast implants as a precautionary measure Medical Device and FDA Regulations and Standards News 0
U SI 13 - Not Every Process Requires an Efficiency Measure IATF 16949 - Automotive Quality Systems Standard 1
P NPR Metric - What if Customer has relaxed measure? TL 9000 Telecommunications Standard and QuEST 1
T Tape Measure, the right device for 2 or 3 decimals accuracy on prints General Measurement Device and Calibration Topics 8
M How do we document and measure a service we do not provide? IATF 16949 - Automotive Quality Systems Standard 1
M For a Type 1 Gage R&R I want to use 1 unit and measure it 30 times Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
M How to Measure Paper considering Variation and Humidity General Measurement Device and Calibration Topics 10
rob73 Advice/recommendations for equipment to measure a soft pvc tube - Optical Measuring? General Measurement Device and Calibration Topics 4
R Height gauge to measure short hard to access heights General Measurement Device and Calibration Topics 3
D Proper Tool to Measure Wall Thickness (ISO 3611 - Micrometers) Manufacturing and Related Processes 7
S Quality Measure for Engineering Services Misc. Quality Assurance and Business Systems Related Topics 1
A What are methods and tools to measure Workload analysis ? Human Factors and Ergonomics in Engineering 1
M How do I measure variation in my process ? Capability, Accuracy and Stability - Processes, Machines, etc. 3
J How to measure process quality? Is DPPM the correct metric? Capability, Accuracy and Stability - Processes, Machines, etc. 5
M Micrometer Anvil Placement to measure the diameter of Steel Wires Measurement Uncertainty (MU) 6
S Where to Get SPC Training to Measure our Processes? Training - Internal, External, Online and Distance Learning 12
M A question on Measurement System Analysis - Stability to measure got Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
S Measure water activity for fresh raw chicken meat and giblets Food Safety - ISO 22000, HACCP (21 CFR 120) 1
O Metrology Devices to Measure the Basic Dimensions of Plastic Specimens General Measurement Device and Calibration Topics 6
L How to Measure Paint Thickness for an Enclosure Manufacturing and Related Processes 5
C Chamfer Measurements - Do you measure the height and width or the hypotenuse? Manufacturing and Related Processes 15
R Repeatability in MSA - Is repeatability a measure of Location Error Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
E How can I measure three true positions? GD&T basic question General Measurement Device and Calibration Topics 5
V How to use a Calibration Certificate in Uncertainty Calculation for a Test Measure Measurement Uncertainty (MU) 13
R How do companies measure QC Productivity? Quality Manager and Management Related Issues 3
V How to measure radius without radius gages APQP and PPAP 4
A Device to measure "Straightness & Deformation" of a metal that's under water Manufacturing and Related Processes 4
M How to measure effectiveness and efficiency of the established QMS as Auditors ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 14
F Specification for how to measure lengths of hose assemblies Various Other Specifications, Standards, and related Requirements 1
P MSA requirements for Systems that Measure Process Parameters Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3

Similar threads

Top Bottom