#
Difference of Static and Dynamic in Quality Engineering

In
quality engineering
, there are
static and dynamic characteristics
.
We can understand the difference of them by other approaches.

##
Difference of Use

Static characteristic is used to study the unevenness of Y.
It is one-dimension unevenness.

Dynamic characteristic is use to study the unevenness of the relationship between Y and X.
It is two-dimension unevenness.

##
Difference of Calculation

There is a difference in the definition of SN ratio.
For SN ratio of dynamic characteristics,
the value of X is used to calculate SN ratio.
But for static, X is not used.

##
Static and Dynamic

For example, in
System Engineering
and
System Dynamics
,
"Dynamic" means "time depended phenomena".

But, in quality engineering, the difference of static and dynamic is not related to time dependence.
It is the important point to understand the quality engineering.

NEXT Static SN Ratio