top of page

What is Participatory Prototyping?

Participatory prototyping is an approach to intervention development combining theory-informed intervention design with a process of iterative optimization led by end-users. An initial intervention design can be optimized through multiple rounds of participation followed by iteration. 


Diagram theory-based intervention components as a process


Specify adaptable components and optimization criterion


Operationalize each component to produce initial “prototype”


Deliver prototype in rounds of 8-15 end-users or clusters


Collect intercept interviews with end-users.


Provide bullet-point summaries to implementers.


Use Nominal Group Technique (NGT) with implementers to generate and prioritize adaptations, deletions, or additions.


Repeat in rounds

More on Nominal Group Technique (NGT)...

NGT is a structured process for

  • generating ideas 

  • prioritizing ideas 

  • reaching consensus among diverse stakeholders

NGT gathers information by asking individuals to respond to questions posed by a moderator, and then asking participants to prioritize the ideas or suggestions of all group members. The process prevents the domination of the discussion by a single person and encourages all group members to participate. 

To learn more about NGT and how to conduct it visit 

bottom of page