Interrelationship digraph is another important tool out of New 7 Quality Tools. It helps to clarify the interrelationship of many factors of a complex situation. It identifies key drivers and the key outcomes.

1. Customer
Complaint
Wrong Data
Collection
Poor Sorting
Lack of Training
Inadequate staff
Poor Final
Inspection
A
B
C
D
E
F
Interrelationship Digraph / New 7 QC Tools
Interrelationship Digraph
2/2
0/4
1/4
2/3
4/1
5/0