Behave Quote by Joel Spolsky
“Something is usable if it behaves exactly as expected.”
About This Quote
Source Book: The Art of Software Development, 2008
A system is reliable when its behavior matches expectations, emphasizing predictability as a core quality.
In simple terms: Predictable behavior equals usability.
Key Takeaway
Design for consistent, expected outcomes.
Themes
usability
reliability
predictability
software design
Mood
analytical
practical
Type
technical
educational
When to use this quote
- API design
- user interfaces
- hardware devices
- process workflows
Key Concepts
engineering principles
human-computer interaction
quality assurance
Questions to Reflect On
- How do you test for unexpected outcomes?
- What trade‑offs exist between flexibility and predictability?
A Different Perspective
Complex systems may have emergent behavior.
