• All submissions are notified to all participants.

    • It is okay while the number of participants is low, but when the number increases, notification overflow occurs.
    • solution - Mention. : Separate notifications for specific individuals from those not addressed to others (Twitter, Slack, kintone, etc.)
  • Asks for information other than body text when submitting

    • Email culture asking for title
    • An approach that encourages organization by pre-assigning attribute information.
    • demerit
      • Raising the bar for submissions
  • When a child comment is added to a parent comment on a tree-like bulletin board, only the latest post in the entire tree is notice.

    • Notification of the parent comment itself is hidden by notification of the child comment.
  • No way to say “I want you to see this.” to a specific person

    • Manual notification occurs in a separate tool.

    • The information is fragmented as the exchange proceeds on that tool.

    • There is no way to distinguish between [I don’t mind seeing it.” and “I want you to see it.”

    • For example, e-mail

    • Blurred distinction between “I’ll share information with you so you can look at it” and “I want you to look at it and respond back.

  • You will be notified of readings.

    • Mr. A is notified if Mr. B has seen Mr. A’s post.
    • At first glance, the advantage appears to be that the sender can know “if the recipient has seen it or not”.
    • On the other hand, it created concepts such as “read-through
    • Receivers get tired when the sender has a “if you saw it, you should reply” culture.
    • Generate behaviors such as “I noticed the notification, but I don’t want to open it because I don’t want to be notified that it has been read.
    • In tools that have “likes,” “liking” can be used as a positive read notification
  • character limit

    • Even if you limit the number of characters, users who want to write long sentences will just throw them in a row.
    • The system will lose track of whether it’s a continuous topic or simply posted at short intervals.
  • Character limit 2: There is no limit to the number of characters of content, but there is a limit to the amount that can be pasted at one time.

    • Users are forced to paste, get rejected, split and paste again.

    • off-line behavior (this is a difficult problem…)

    • Tools that do not allow offline input force the human living brain to remember, “I’ll type it in later when I’m online.

      • forget
      • Or write in another tool.
        • Write in another tool and forget to post it.
    • DM prohibition

    • Prohibits one-on-one communication

    • If you leave the need for “one-to-one communication” unattended and ban only the means, users will use other methods of one-to-one communication.

  • No permalinks for posts

    • Cannot point to it with a link when referring to it later
  • No way to see read notifications.

    • When a notification is read, there is no way to see that read.
    • Once you see the notification and think “I’ll take a closer look at this later” or “I’ll take action later”, you need to re-post that link somewhere, or else “Where was that?” becomes

bad culture

  • Forced to Like

    • When combined with people who have a high need for control over others, they start thinking that all their subordinates should like their posts.
    • When you see how many total likes you have, you’ll know right away that you’re missing one.
    • If you can see who has liked it, you can also see who hasn’t.
    • The like mechanism itself is not bad, but there are organizational cultures that are incompatible.
  • bad pattern


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