If you are trying to discover unmet needs that consumers can not articulate, there is no way that a survey asking respondents to rank items from 1-10 will offer any insight.

• 再说详细一点，如果你希望探索那些用户自己都不能明确表达的需求，递给他一张问卷让他打出1到10分对你没什么帮助。