Product dispositioned for scrap shall be conspicuously and permanently marked, orpositively controlled, until physically rendered unusable. 决定销毁的产品应该被打上明显的永久性标记,或者被严格控制,直到经过处理而真正不可再用为止。
Usability is the ease of use and learnability of a human-made object. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use.