#07 Flexibility and efficiency of use 柔軟性と効率性 Accelerators — unseen by the novice user — may often speed up the interaction for the expert user such that the system can cater to both inexperienced and experienced users. Allow users …

#06 Recognition rather than recall 記憶しなくても、見ればわかるようにする Minimize the user's memory load by making objects, actions, and options visible. The user should not have to remember information from one part of the dialogue to an…

#05 Error prevention エラーを防ごう Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a con…