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Following are some use cases for a theoretical system
that would allow PTKContent to be rated by portal members.
Rating would be a complement to discussions, enabling
members to share their thoughts about content in a
quantitative manner. Feedback is welcome; however, please use
the ContentRatingDiscussion page rather than making comments
inline.

Actors

  Manager (Reviewer)

  Member

Reviewer Creates Criterion

  Goal -- Give members a common criterion for rating content

  Description

    From a screen (not yet existing within PTK) similar to
    an object's properties screen, Reviewers have the
    ability to add a new criterion for a particular content
    type.
    
    For any given criterion, a reviewer submits a label, a
    short description of the criterion, and a numerical
    range for members' ratings.
 
    After you create a criterion for a content type, members
    will have an opportunity to rate objects of the type
    in question based on your criteria.

Member Rates Item

  Goal -- Share with the community a quantitative impression
  of how portal content meets one or more criteria.

  Description

    If you are viewing a portal content item of a type for
    which a reviewer has established one or more criteria,
    an action will appear in your actions menu which reads
    "Rate this item".

    Clicking on this link will take you to a screen
    which displays all criteria available for the content
    type in question, as well as an input allowing you to
    set numerical ratings for each criterion.

    Clicking the button reading "Enter my ratings" will
    factor your rating(s) into the average rating(s) for
    the object.

Member Views Item Ratings

  Goal -- Discover how other members rated a content item.

  Description

    For any item which has been rated against one or more
    criteria, there will be a way of discovering the average
    rating for that object, which represents the average of
    all member ratings for that object.

Member Views Collection of Rated Items

  Goal -- View a collection of rated items sorted by rating
  for a particular criterion

  Description

    If you are viewing an object which represents a
    collection of items (folder, search return, etc), some
    of which have been member-rated, you may sort objects
    based on the average ratings for a particular criterion.

Scenario - Knowledge Base

  A rating system as described in this document could be
  used to implement some common features of a 'knowledge
  base':

  An online community with a large number of HOWTO's wants
  to allow members rate the 'helpfulness' of individual
  HOWTO's and browse a collection of HOWTO's based on how
  helpful they were to other members.

  The reviewers for this community create a criterion
  labelled 'helpfulness', with a short description 'How
  helpful was this item?', and a numerical range of 1-10.

  Joe User visits the site, trying to determine how
  to install foo in bar. Searching on the key words 'foo
  bar' returns Joe a list of documents which
  contained the strings in question; these results are
  automatically sorted by 'helpfulness' (optionally, Joe
  could be allowed to specify a sort order, and
  'helpfulness' could be one of the factors in that sort).

  Joe finds a document which is very helpful in guiding him
  through the process of installing foo in bar, and so he
  rates this item a '10' for helpfulness.

Glossary

  Rating -- An individual member's quantitave impression of
  how an object meets a particular criterion.

  Average Rating -- The numerical average of all ratings for
  a particular criterion for a particular object.