Errors of measurement in quality of product, Supply Chain Management

Errors of Measurement

To ensure the quality of a product, errors of measurement is very important, as test cases are executed at various levels defects if found any in the tested area. The defects are logged and data is collected. The defects are then fixed. The testing team verifies if the defect was really fixed and closes the defects. This information is very beneficial. Proper tracking ensures that all defects were fixed. This information also helps in future projects.

Variation in a process has two sources:

  • Variation of the process that makes the product.
  • Variation of the measurement process.

Even when rightly used, a measuring instrument may not give a true reading of a characteristic. The distinction between the true value and the measured value can be due to one or more five sources of variation.

Bias is the difference between the observed average of measurements and the reference value. The reference value is also termed as accepted reference value or master value. It is a value that serves as an agreed-upon reference for the measured values.

Any statement of bias and repeatability must be preceded by three conditions:

  • Definition of the test method: this definition includes the step-by-step┬áprocedure, equipment to be used, preparation of test specimens, test conditions and so on.
  • Definition of the system of causes of variability: these include materials, analysts, apparatus, and laboratories.
  • Existence of a statistically controlled measurement process: the measurement process must have stability for the statements on bias and precision to be valid.

Errors of measurement can cause incorrect decisions on:

  • Individual units of product.
  • Lots submitted to sample the plans.

In the classification of a product, two types of errors can occur, they are:

  • A non conforming unit can be accepted (the consumer's risk).
  • A conforming unit can be rejected (the producer's risk).
Posted Date: 9/29/2012 2:44:08 AM | Location : United States







Related Discussions:- Errors of measurement in quality of product, Assignment Help, Ask Question on Errors of measurement in quality of product, Get Answer, Expert's Help, Errors of measurement in quality of product Discussions

Write discussion on Errors of measurement in quality of product
Your posts are moderated
Related Questions
Case study 2000 words

A proactive strategic procurement operation can give the organisation it represents a competitive advantage by reducing waste in the value chain. For an organisation of your choice

questionHow will you influence people to strive willingly for group objectives in your organization (target based industry)? Apply your interpersonal influence through communicatio

tangible and intangible of scm

How to integrated the cost elements such as administrative overheads and risks in total landed cost model? Seems these two cost elements are hard to quantify.

Describe how negotiations with suppliers are conducted to obtain goods and services at accepted costs. What are the channels of distribution for the different types of goods?

Find three examples within your transformation process where it is possible to make an error resulting in defective output. 1) Identify what warning signs indicated a potential

Seamless Integration: Integration of new product introductions or changes to existing products fully into the enterprise system also known as engineering change management is cruc

Question 1: Describe the several principles of Quality Management Systems. Describe Quality Management System Principles of Quality Management Systems Conclusion