<s>
In	O
quality	O
control	O
,	O
multi-vari	B-Application
charts	I-Application
are	O
a	O
visual	O
way	O
of	O
presenting	O
variability	O
through	O
a	O
series	O
of	O
charts	O
.	O
</s>
<s>
Multi-vari	B-Application
charts	I-Application
were	O
first	O
described	O
by	O
Leonard	O
Seder	O
in	O
1950	O
,	O
though	O
they	O
were	O
developed	O
independently	O
by	O
multiple	O
sources	O
.	O
</s>
<s>
They	O
were	O
inspired	O
by	O
the	O
stock	O
market	O
candlestick	B-Application
charts	I-Application
or	O
open-high-low-close	B-Application
charts	I-Application
.	O
</s>
<s>
As	O
originally	O
conceived	O
,	O
the	O
multi-vari	B-Application
chart	I-Application
resembles	O
a	O
Shewhart	B-Application
individuals	I-Application
control	I-Application
chart	I-Application
with	O
the	O
following	O
differences	O
:	O
</s>
<s>
More	O
recently	O
,	O
the	O
term	O
"	O
multi-vari	B-Application
chart	I-Application
"	O
has	O
been	O
used	O
to	O
describe	O
a	O
visual	O
way	O
to	O
display	O
analysis	B-General_Concept
of	I-General_Concept
variance	I-General_Concept
data	O
(	O
typically	O
be	O
expressed	O
in	O
tabular	O
format	O
)	O
.	O
</s>
<s>
Because	O
it	O
is	O
a	O
two-dimensional	O
representation	O
of	O
multiple	O
dimensions	O
(	O
one	O
for	O
each	O
factor	O
in	O
the	O
ANOVA	B-General_Concept
)	O
,	O
the	O
multi-vari	B-Application
chart	I-Application
is	O
only	O
useful	O
for	O
comparing	O
the	O
variability	O
among	O
at	O
most	O
four	O
factors	O
.	O
</s>
