Abstract
Usability involves connecting design to need. Individuals need to achieve an objective; if the design of an item meets that need, the item is usable. If not, it is not. So, usability depends on how well the design of an item addresses the need of the user. The need to hold two items together, for example, can prompt individuals to design a fastener in order to meet that need. The usability of the resulting design, however, is a matter of how effectively the individual can use it to hold items in place.