Consumability 可消费性， 用户体验

A concept recently championed by International Business Machines (IBM), the idea of consumability is that there are a set of attributes that are particularly important to the client experience. By increasing the consumability of the product, you increase the value of that software to the client. People must be able to not only know about a software product, but also be able to use it easily.

The following components are often the most scrutinized when evaluation your software for consumability:

    * Installation
    * Configuration
    * Maintenance
    * Problem determination
    * User experience

In software development, "consumability" is often used synonymously with "usability" despite a different literal meaning.

Usability consultant Jakob Nielsen and computer science professor Ben Shneiderman have written (separately) about a framework of system acceptability, where usability is a part of "usefulness" and is composed of:

    * Learnability: How easy is it for users to accomplish basic tasks the first time they encounter the design?
    * Efficiency: Once users have learned the design, how quickly can they perform tasks?
    * Memorability: When users return to the design after a period of not using it, how easily can they re establish proficiency?
    * Errors: How many errors do users make, how severe are these errors, and how easily can they recover from the errors?
    * Satisfaction: How pleasant is it to use the design?