Principle Testing
Duration
45-60 minutes
Objective
Test your design principles against real scenarios to ensure they provide clear, actionable guidance for decision-making.
Materials Needed
Printed copies of draft principles
Scenario cards (prepared in advance)
Decision worksheets
Dot stickers for voting
Timer
Setup
Prepare 3-5 realistic design scenarios that represent common challenges your team faces
Create a worksheet with columns for each principle and rows for each scenario
Divide participants into small groups of 3-4 people (ideally cross-functional)
Exercise Steps
01 Introduction (5 minutes)
Explain that good principles should guide consistent decisions
Review the draft principles with the group
Explain the scoring system (1-5 scale where 5 = very helpful in guiding decisions)
02 Scenario Testing (30 minutes)
For each scenario:
Read the scenario aloud to all groups
Each group discusses how each principle would guide decisions in this scenario
Groups rate each principle's helpfulness on a 1-5 scale
Groups document specific guidance each principle provides
Note any conflicts between principles or areas where guidance is unclear
Move to next scenario after 6-8 minutes
04 Group Discussion (15 minutes)
Each group shares their highest and lowest scoring principles
Identify principles that consistently provided clear guidance
Discuss principles that were ambiguous or unhelpful
Note where principles conflicted with each other
Collect suggestions for improving lower-scoring principles
04 Refinement Planning (10 minutes)
Prioritize 1-3 principles needing most improvement
Brainstorm specific language changes that would improve clarity
Identify gaps where new principles might be needed
Assign responsibilities for refinement
Sample Scenario Card
Scenario: Mobile App Navigation Redesign
Your team is redesigning the navigation for your mobile app. User research shows
that users struggle to find key features, but your app has many important functions
that need to be accessible. Marketing wants to highlight new premium features,
while the product team prioritizes frequently used functions.
Design challenge: How would you approach this navigation redesign, and what
would guide your decision-making process?
Expected Outcomes
Evidence-based assessment of each principle's practical utility
Clear understanding of which principles need refinement
Documentation of how principles apply to common scenarios
Improved language for ambiguous principles
Greater team alignment on how to apply principles in practice
This exercise transforms abstract principles into practical decision-making tools, ensuring they provide real value to your design process.