I faced an unique problem with Facebook off-late.
My friend Suzee got engaged to her dream man recently. She works as a media person & has almost 500 people in her Facebook friends list; who are quite active in interacting with her. But I don’t know many of them.When she posted her engagement snap, I too expressed my happiness and commented on it. As she has enormous number of friends, they didn’t leave any chance in commenting on her engagement photo. (Persona, of a typical user)

So what’s the problem in it ?
I have enabled an option to receive Facebook comments notifications to my email. Meaning, every comment or like the Suzee’s engagement photo gets, I get an email notification from Facebook.

Now what ? why Facebook team is not aware of this ?
Infact, this lies in the problem of context analysis Facebook design team has done with the comment and notification design. They have used an unique way to get to know what happens amongst friends, get to hear the rumors, get to know what known people are talking in ethnography. But they failed to understand the above context I mentioned. They fail to assess the individual context where ‘user just would like to comment but do not want to receive notification’
Now, I only want to to wish her or comment on the photo but don’t want to receive bulky email notifications from a single post. So one solution would be to turn-off email notifications altogether. Which would disable notifications across Facebook ! So Facebook could have done a ‘Context of Use and analysis’. which means – analyze the set of users, their actions and interactions with the application and address the outcome of it’.
They have done it but they failed to provide a solution for the question ‘what if user want to comment but don’t want to receive notifications from the comments thread’. (Problem Assessment)
This is what I propose as a design (UID) solution to the potential Facebook-bulk-notification problem. A check-box to disable notifications for an individual Facebook post. (Solution proposal)

The Context of Use is the actual conditions under which a given artifact/software product is used, or will be used in a normal day to day working situation. It is important to carry out usability tests, prototyping sessions, meetings, user studies and other “user-dependent sessions” in the context of use to get as high ecological validity of users findings as possible. | via