Formulary Quality Management and summarize chapter 1 and 3
30 views 0 purchase
Course
Quality Management
Institution
Katholieke Universiteit Leuven (KU Leuven)
Formulary (4 pages) which includes the solvation of the example exam. Includes also a summarize of chapter 1 (quality definition) and chapter 3 (accuracy, precision and R&R analysis) - prof. dr. Matuschke
Chapter 3: Measuring
Problem: how do I know that measurements are correct? Are the numbers reliable? If we cannot
trust numbers we cannot do any quality management.
Metrology
= science of the measurement
Measurement is an essential component of any quality system
Scales
- Nominal scale
o Categorizes objects, non-dimensional
o Cannot be compared
o Example: oranges, bananas…
- Ordinal scale
o Implies an order of objects, but says nothing about the distance or difference
between two successive objects.
o Comparable (an order)
o Example: Michelin stars
- Interval scale
o Allows for a degree of difference between objects, intervals are comparable, but not
ratios.
o Comparable (only distances)
o Example: temperatures with Celsius scale
- Ratio scale
o Measurement compared to a unit magnitude, with a meaningful zero value
o Most well ordered: you can compare
o Example: mass, length, duration
Measurements can contain errors:
1. Human aspects
a. Error rates in manual inspection:
Complexity: high number of characteristics -> more mistakes
Defect rate: if low more defects are overlooked
Inspection rate: if high speed more mistakes
b. Guidelines:
Minimize number of characteristics to be inspected
Reduce time pressure
Repeated inspection
Provide clear inspection procedures
Automate
2. Instrument aspects
a. Calibration
= verify (and adjust) the performance of measuring device compared to
traceable measurement standards
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sepm13. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.11. You're not tied to anything after your purchase.
