Descriptive statistics
Statistical tests
Design of Experiment
Gage RR
Problem resolution
Reliability
Control plan
Menu della guida per l'utente

Guida utente

Calculating the number of repetitions

Ellistat provides a little tool to calculate the number of repetitions necessary depending on the number of factors and interactions in the selected table and the smallest effect that we want to highlight in regards to the expected residual dispersion from the tests.
Example: you want to create an design of experiment with an L8 table to study 5 factors and 2 interactions.
Calcul-du-nombre-de-repetition
The study result is the temperature obtained. The target is 120°c ± 10°c.
Any factor for which the effect is less than 1° does not interest us. So we enter 1 for the smallest effect that we wish to highlight.
We know that normal production gives us a temperature that varies ± 4° (estimation made by experts). This estimation covers 95% of the real dispersion (± 2 sigma) so we estimate the residual standard deviation as 2.
If we know the short term standard deviation of the process from another study, we enter this standard deviation rather than making an estimate

Una soluzione completa per l'Industria 4.0

8 moduli statistici

trial

Test

0

30 giorni

Testalo gratuitamente

APC

SPC

Controllo

Analisi

check

30 giorni

check

Tutte le funzioni di Ellistat

check

1 utente

Supporto tecnico e ed aggiornamenti inclusi

student

Studente / Insegnante

0

1 anno

Checkout

Analisi

check

1 anno

check

Tutte le funzioni di Ellistat

check

1 utente

check

Licenza dedicata agli studenti che dispongono di una tessera studente in corso di validità

Supporto tecnico e ed aggiornamenti inclusi

standard

Standard

49

per utente al mese

Checkout

Analisi

check

Licenza rinnovata ogni mese

check

Tutte le funzioni di Ellistat

check

Utenti illimitati

check

Supporto tecnico e ed aggiornamenti inclusi