Understanding Usability
Definition
Usability
The degree to which a product enables specified users to achieve defined goals effectively, efficiently, and with consistency and predictability.
Usability is not just about functionality, it's about creating a seamless and enjoyable user experience.
The Five Usability Objectives
Definition
Usability objectives
Usability objectives include learnability, efficiency, memorability, errors and
satisfaction. These objectives provide a framework for evaluating and improving products.
- Learnability
- Efficiency
- Memorability
- Errors
- Satisfaction
1 - Learnability
Definition
Learnability (usability)
The ease with which a user can reach a defined level of competence with a product or system after a set amount of training or use.
- Intuitive Design: Are the controls and features easy to understand without a manual?
- Clear Instructions: Are there helpful guides or tutorials for new users?
- Consistent Interface: Does the design follow familiar patterns and conventions?
- Consider a new smartphone app.
- If users can navigate its features without extensive instructions, it has high learnability.
2 - Efficiency
Definition
Efficiency (usability)
A usability objective that measures the speed and accuracy with which users can perform the intended task of a product.
- Streamlined Processes: Are there shortcuts or automation to speed up tasks?
- Minimal Steps: Can users achieve their goals with minimal effort?
- Responsive Design: Does the product respond quickly to user inputs?
