User's Guide Menu

User Guide

Range method

Bouton-tableur
The range method is particularly used in the industry as its calculations can easily be done by hand.
This method makes it possible to calculate measurement systems' repeatability and reproducibility but does not allow for interaction calculations, which limits its reach. The calculations carried out in this method are based on the calculation of the intra-sample standard deviation from the range.
The principle of the calculation is the following:
1 - Illustration
Consider the entirety of measurements for each part by each operator as a sample. In this way the intra-sample variability represents the repeatability of the measurement system that is calculated by:

More details

Next the measurements average of each operator is considered as a sample, which makes it possible to calculate the reproducibility of the measurement system by:
The details of these calculations are provided in the following example:
Exemple GRR
Repeatability calculation:
Reproducibility calculation:
Variability calculation of the measurement system:
We can therefore deduce:

A complete solution for Industry 4.0

8 Statistical Modules

trial

Trial

€ 0

1 month

Try it for free

APC

SPC

Control

Analysis

check

1 month

check

All feature's of Ellistat's Analysis Module.

check

1 user

Technical support and updates included.

student

Student

€ 0

1 year

Checkout

Analysis

check

1 year

check

All feature's of Ellistat's Analysis Module.

check

1 user

check

Dedicated student licence upon presenting a valud student card.

Technical support and updates included.

standard

Standard

€ 49

per user per month

Checkout

Analysis

check

Automatic monthly renewal

check

All feature's of Ellistat's Analysis Module.

check

Unlimited users.

check

Technical support and updates included.