# Desirability, viability, feasibility and concept prototypes

*Platform Strategy Designer Study Guide · Tools and Artifacts · Last updated November 2, 2026 · https://www.certifyforce.com/study-guide/platform-strategy-designer/tools-and-artifacts/desirability-viability-feasibility-and-concept-prototypes*

How to judge solution concepts through the desirability, viability and feasibility lenses with a comparison chart, who supplies the evidence for each lens, and how to turn assumptions and what-must-be-true conditions into prototype questions answered at the right fidelity.

- Certification: Salesforce Platform Strategy Designer
- Exam section: Tools and Artifacts
- Study guide: https://www.certifyforce.com/study-guide/platform-strategy-designer

**Official exam objective:**

> Given a customer scenario, determine the criteria for feasibility, desirability, and viability within a user experience.

## What the exam expects

- Sort evidence and questions into desirability, viability or feasibility, and name who supplies each kind of evidence.
- Use comparison-chart questions to expose the merits and trade-offs of each concept.
- Turn assumptions and "what would have to be true" conditions into prototype questions, and prototype the biggest risk first.
- Pick the right research type and prototype purpose (ideation, exploration, validation) for where the project is.
- Describe prototype fidelity by dimension, including mixed fidelity.

Key terms: **desirability** (what is valuable to the user); **viability** (what is valuable to the business); **feasibility** (what is technically possible); **prototype** (an experiment purpose-built to answer a specific question); **fidelity** (how closely a prototype conveys the intended experience of the final product).

## Key facts

| Fact | Detail | Source |
|---|---|---|
| Desirability | What's valuable to the user; check against earlier research insights | [Analyze and Narrow Solution Concepts](https://trailhead.salesforce.com/content/learn/modules/strategic-vision-creation/analyze-and-narrow-solution-concepts) |
| Viability | What's valuable to the business; consult business analysts | [Analyze and Narrow Solution Concepts](https://trailhead.salesforce.com/content/learn/modules/strategic-vision-creation/analyze-and-narrow-solution-concepts) |
| Feasibility | What's technically possible; share ideas with developers or architects | [Analyze and Narrow Solution Concepts](https://trailhead.salesforce.com/content/learn/modules/strategic-vision-creation/analyze-and-narrow-solution-concepts) |
| Scalability | A feasibility question: can the concept scale with the platform as use grows? | [Salesforce Platform](https://www.salesforce.com/platform/) |
| Prototype levels | From high-level strategic questions to tactical and experiential ones | [Explore Key Prototyping Considerations](https://trailhead.salesforce.com/content/learn/modules/design-strategy-prototyping/explore-key-prototyping-considerations) |
| Exploration research focus | Desirability and feasibility, to mitigate risk | [Understand the Role of Research in Design Strategy](https://trailhead.salesforce.com/content/learn/modules/research-for-design-strategy/understand-the-role-of-research-in-design-strategy) |
| Three prototype uses | Ideation, exploration, validation | [Explore Key Prototyping Considerations](https://trailhead.salesforce.com/content/learn/modules/design-strategy-prototyping/explore-key-prototyping-considerations) |
| Fidelity dimensions | Form, aesthetics, content, behavior; can be mixed | [Explore Key Prototyping Considerations](https://trailhead.salesforce.com/content/learn/modules/design-strategy-prototyping/explore-key-prototyping-considerations) |
| First prototyping question | What are you trying to learn? | [Explore Key Prototyping Considerations](https://trailhead.salesforce.com/content/learn/modules/design-strategy-prototyping/explore-key-prototyping-considerations) |

## Check yourself

- Why does a prototype often beat a written explanation of a concept?
- When should prototypes reach higher fidelity?
- What kinds of things can a prototype answer questions about?
- Why create many early prototypes rather than one?

## Sources

- [Analyze and Narrow Solution Concepts](https://trailhead.salesforce.com/content/learn/modules/strategic-vision-creation/analyze-and-narrow-solution-concepts)
- [Explore Key Prototyping Considerations](https://trailhead.salesforce.com/content/learn/modules/design-strategy-prototyping/explore-key-prototyping-considerations)
- [Understand the Role of Research in Design Strategy](https://trailhead.salesforce.com/content/learn/modules/research-for-design-strategy/understand-the-role-of-research-in-design-strategy)
- [Study Up on Tools and Artifacts](https://trailhead.salesforce.com/content/learn/modules/salesforce-strategy-designer-certification-prep/study-up-on-tools-and-artifacts)
- [Salesforce Platform](https://www.salesforce.com/platform/)

## About the full unit

The "Core concepts", "Exam traps" and "Worked scenario" sections of this unit, its 22 linked practice questions, and unlimited timed mock exams are included with the Platform Strategy Designer pack (USD $19): https://www.certifyforce.com/practice-exams