The interrelationship digraph
is used to show cause-and-effect relationships between identified
factors surrounding an issue. Teams can look globally at several
factors and determine the logical sequence of events to obtain the
To develop the factors used for the
interrelationship diagraph, you might use the header cards from an
- 1. write the identified factors
on a flip chart in random positions around the initial topic.
- Step 2.
- Start with one of the factors,
draw arrows from it to each of the other items that it impacts.
- Ask, Is "A" required to get
to "B, etc."?
- Step 3.
- Move to another item and repeat
the process until every other item has been analyzed with regard
to its impact on all other items.
- Step 4.
- Using a marker of one color,
note beside each item the number of arrows pointing to it
- Use a marker of another color
to note beside each item the number of arrowsleading away from
- Step 5.
- The analysis should reveal the
primary focus or end result of the issue being examined, based
on the highest number of arrows pointing to the item.
- The analysis should also reveal
the key causal factor - based on the highest number of arrows
leading away from the item.
- Subsequent analysis should reveal
a logical implementation sequence in order to achieve the desired