Welcome to the Forum.
You can try setting the Targets in a calculated field like:
CASE [Overall Rating Value]
WHEN 1 THEN .1
WHEN 2 THEN .2
WHEN 3 THEN .4
WHEN 4 THEN .2
WHEN 5 THEN .1
And then placing that field on the Detail Shelf,
and use it as a reference line.
Alternatively, you could put the target on a second axis
using the dual axis approach.
Of note, you will need to use an aggregation of MIN(Target)
to get it to work.
Please see the attached in the Forum post.
Not sure if this is pertinent to your data, but there is an upcoming webinar on Presenting similar type data in Tableau:
You can learn more and sign up today for this online webinar here: Jump Start Visualizing Your Survey Data Using
This link of his is excellent:
254235rating.twbx 90.8 KB