●Matrix data analysis
“Matrix data analysis” is a method for organizing data properties when it
is possible to express the interrelationships among multiple data matrices
as numerical data. It makes it possible to grasp the characteristics of each
element when a large volume of data makes the overall picture difficult to
understand.
Trainee
A
Administrative skill
Technical Administrative
skill
skill
5
9
7
8
9
2
D
4
7
E
1
9
Average
5.2
7.0
E
If focusing on
technical skills,
choose B, C
A
B
D
5
C
10
5
5.2 (average)
Technical skill
●Z graph
A “Z graph” expresses trends over time, and is named after the “Z” shape
that the lines assume.
For example, this graph shows revenues, cumulative revenues, and moving
totals (cumulative over past year). If the moving-total trend line is rising,
then sales results are solid; if the line is dropping, then results are poor.
Corporate and legal affairs
B
C
10
Chapter 1
Skill table
Sales results table
This year
Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sales
90
70
70
50
90 110
80 100
70
60
80
90 100
80
790 840
Moving total
820 840 860 880 890 910 930 940 940 940 950 960 970 980
Amount
Total
70 120 210 320 400 500 570 630 710 800 900 980
1200
1000
800
600
Profit
Total
400
Moving total
200
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Period
24