This document summarizes different approaches that were used to rank 7 potential diagnostic test product concepts, including:
1) Having physicians rate each concept individually on a Likert scale; 2) Forcing physicians to rank all concepts; 3) Conducting a conjoint analysis to identify attribute preferences; and 4) Asking what products physicians would not buy.
The results varied across the different studies, suggesting no single concept was robustly preferred. While concept A seemed unlikely to be desired, concepts B and E could have been chosen, but were also not consistently highly ranked. Concept C emerged as the best backup idea.
Additionally, when concepts were analyzed based simply on being diagnostic vs. prognostic, physicians appeared indifferent
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Product Market Triangulation
1. Likert scale
Force rank
| assign
fixed points
or % to 100
A
A
Conjoint
utility
A
Conjoint
market
share
A
B
C
E
E
C
F
C
D
D
B
D
C
E
E
G
G
F
D
F
F
G
G
B
B
Moreover, there are not just market
expectations, but for real-world products,
limitations or additional features (e.g., to
meet unspecified needs rather than
desires). Also, competition and
competitive response need to be
incorporated.
In healthcare, idiosyncrasies exist, such
as difference among primary care and
medical specialties.
Different approaches can be used to rank product concepts. Each
method has tradeoffs. And each can miss the mark.
Using a variety can reveal robust product concepts.
In this context, to the left and right is a real example of 7 product
ideas (diagnostic tests).
While in hind sight, A is almost not believably desired, the more
interesting point is how the other concepts vary across studies.
Specifically, either B or E could have been chosen as a product,
especially if A had development issues. But neither B nor E is
robustly wanted. Instead C would be the best back up idea.
Often not asked, but powerful.
What product would you not buy?
C
A
B
E
F
D
G
The various approaches
Market
expectation
Product
performance
Primary
care versus
specialist
Company
versus
competition
≒ Physicians were asked on a (Likert) scale,
how much they liked a concept in
isolation.
≒ Some doctors forced ranked the complete
ideas.
≒ A conjoint analysis was done to identify
the utility of various individual attributes.
≒ The conjoint analysis was also compared
to competitive products.
≒ MDs were ask what they would not buy.
Diagnostic
Prognostic
Primary care
Prefer
Assume
colleague has
sufficient tools
to treat
Specialty
Assume
colleague has
sufficient tools
to diagnose
Prefer
One last twist to mention.
≒ When analyzing the desired products by one
quantitative aspect, diagnostic versus
prognostic assay, there appeared to be little
preference.
≒ However, during focus groups and subsequent
follow up, there were strong opinions,
differentiated by primary versus specialty
care.
≒ Interestingly, the conflict illustrated respect
for the other physician. A strong perception
that they already had sufficient tools and
capabilities.
Diagnostic
Source: Disguised real data from a single product development project
Indifferent
Prognostic
息 2013 Winton Gibbons