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SM2222: Information Design and Visualization Organization Systems on Web 28 October 2005. The beginning of all understanding is classification. - Hayden White. What do you do?. Where do you live?. Who are you?. Organizing information. - PowerPoint PPT Presentation
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SM2222: Information Design and Visualization
Organization Systems on Web
28 October 2005
The beginning of all understanding is classification.
- Hayden White
Where do you live?
What do you do?
Who are you?
Organizing information
• Our understanding of the world is largely determined by our ability to organize information
• Our answers reveal the systems of classification that form the very foundations of our understanding
• Classification systems reflect social and political perspectives and objectives
• The way we organize information influences the way people comprehend that information
The quest for order
• Classifying things - whether on the web, in a library, or in the supermarket - is about providing paths to information by showing relationships
• When things are where you expect them, they’re easy to find
• The Lord of the Rings is in the fantasy section, which in the fiction department, which is in the bookstore
• Then, how do we find marshmallows in the supermarket?
- The problem with knowledge is that it’s not made up of simple linear relationships. It’s a messy interrelated thing.
- The Lord of the Rings might not be in the fantasy section, but in with the classics.
- So the question is who’s to judge which of these relationship is more important?
Relationships are subjective
Relationships are subjective
CLASS EXERCISE : Take the following list of 9 items and ask 3 different people to organize them.
• Refrigerator
• Socks
• Dresser
• Living Room
• Dictionary
• Kitchen
• Milk
• Bookshelf
• Bedroom
By Alphabetical list
• Bedroom
• Bookshelf
• Dictionary
• Dresser
• Kitchen
• Living room
• Milk
• Refrigerator
• Socks
By Size
• Large – Kitchen– Bedroom– Living Room
• Medium– Bookshelf– Refrigerator– Dresser
• Small– Socks– Dictionary– Milk
By Room
• Stuff in Kitchen
– Refrigerator
– Milk
• Stuff in Living room
– Dictionary
– Bookshelf
• Stuff in Bedroom
– Dresser
– Socks
By Exact Location
• Kitchen->Refrigerator -> Milk
• Living room->
Bookshelf-> Dictionary
• Bedroom->Dresser->Socks
Organizing information is a subjective task
Because relationships are subjective. People will approach it in very different ways, often based on their own context, knowledge, and experience.
- That’s why there are many large web sites so difficult to navigate?
- And explain why can’t the people who design these sites make it easy to find information?
The challenges of organizing information
• We are becoming librarians
• Dewey Decimal Classification
• Anglo-American Cataloging Rules
• Internet provides users with the freedom to publish information
• We are facing severe information-overload challenges
000-099 Generalities100-199 Philosophy and Psychology200-299 Religion300-399 Social Sciences400-499 Language500-599 Natural Sciences and Mathematics600-699 Technology (Applied Sciences)700-799 The Arts800-899 Literature and Rhetoric900-999 Geography and History
Kilobyte (KB) = 1,000 bytesMegabyte (MB) = 1,000,000 bytesGigabyte (GB) = 1,000,000,000 bytesTerabyte (TB) = 1,000,000,000,000 bytesExabyte (EB) = 1,000,000,000,000,000,000 bytes
World Wide Web : 170,000,000,000,000 bytes
Information grew per year : 1 - 2,000,000,000,000,000,000 bytes
* Source from University of California at Berkeley in 2003
Why organizing information in useful ways is so difficult?
Why organizing information in useful ways is so difficult?
• Ambiguity
• Heterogeneity
• Differences in Perspectives
• Internal Politics
Ambiguity
• Classification systems are built upon the foundation of language. Language is ambiguous (e.g. 豬扒 ).
• When we use words as labels for categories, we run the risk that users will miss our meaning.
• Ambiguity results in a shaky foundation for our classification systems.
Ambiguity
• We also need to agree on which documents to place in which categories.
• Tomato is “a red or yellowish fruit with a juicy pulp, used as a vegetable: botanically it is a berry.” Is it a fruit or a vegetable or a berry?
• Classification is particularly difficult when they are abstract concepts, e.g. “alternative healing”
* Webster’s dictionary
Heterogeneity
• Heterogeneity refers to an object or collection of objects composed of unrelated or unlike parts (e.g. mix-vegetables soup).
• Homogeneity refers to something composed of similar or identical elements, a structured classification system (e.g. old-fashioned library card catalog).
• The heterogeneous nature of web sites makes it difficult to impose any single structure organization system.
Differences in perspectives
• Have you ever tried to find a file on a co-workers/friends’ desktop computer?
• The ways people organize and name files and directories on their computers can be maddeningly illogical.
• Labeling and organization systems are intensively affected by their creator’s perspectives.
• To design usable organization systems, we need to escape from our own mental models of content labeling and organization (org charts).
• One site does not fit all
Internal politics
• Politics exist in every organization.
• The choice of organization and labeling systems can have a big impact on how users of the site perceive the company and its products.
• Example: Should information resources provided by other departments be included in the main page?
• Focusing on create an architecture that works for the users.
How do we organize information successfully in web site?
Organizing information in web sites
• Organization Schemes and Organization Structures.
• Organization Scheme defines the shared characteristics of content items and influences the logical grouping of those items.
• Organization Structure defines the types of relationships between content items and groups.
Then what is all about Organization Schemes?
Organization schemes
• We navigate through organization schemes every day.
• Telephone books, supermarkets, and television programming guides.
• But some schemes are intensely frustrating (are marshmallow in snack aisle or baking ingredients section, both or neither?)
• Exact Organization Schemes (phone book) vs. Ambiguous Organization Schemes (supermarket)
1. Exact Organization Schemes
• Dividing information into well-defined and mutually exclusive sections.
• White pages is a perfect example. If you know the last name of the person you are looking for, navigating the scheme is easy (Chan is in the “C” section).
• This is called known-item searching, which refers to you know what you’re looking for, and it’s obvious where to find it. No ambiguity is involved.
• 3 frequently used exact organization schemes
Alphabetical organization
• The primary organization scheme for encyclopaedias and dictionaries.
• All nonfiction books provide an alphabetical index
• Phone books, department store directories, bookstores and libraries all make use of 26-letter alphabet for organizing the content.
Chronological organization
• Certain types of information are organized by the date and time.
• Example: Press release archives are obvious candidates for chronological organization schemes.
• The date of announcement provides important context for the release.
• History books, magazine archives, diaries, and TV guides tend to be organized chronologically.
Geographical organization
• Place is often an important characteristic of information.
• We travel from one place to another.
• We care about the news and weather that affect us in our location.
• Political, social, and economic issues are frequently location-dependent.
2. Ambiguous Organization Schemes
• They divide information into categories that resist exact definition and are muddy in the ambiguity of language and organization.
• Therefore, they are difficult to design and maintain. Remember the tomato? Do we put it under fruit, berry or vegetable?
• However, they are often more important and useful than Exact Organization Schemes.
• Because, most of the time, we don’t always know what we’re looking for and the correct label. We may only have a vague information.
• AOS has made an intellectual decision to group related items to support an associative learning process that may enable users to reach better results.
Topic organization
• Organizing information by subject or topic is one of the most useful and challenging approaches.
• Yellow pages are organized topically, so that’s the place to look when you need a plumber/ taxi-driver.
• Academic courses, departments, newspapers are organized along topical lines.
Task organization
• Task-oriented schemes organize content and applications into a collection of process, functions or tasks.
• A high-priority tasks that users will want to perform.
• Example: desktop software application such as Word Processors and spreadsheets.
• They are most common in the context of e-commerce web sites where customer interaction takes centre stage.
Audience organization
• It makes possible if two or more clearly definable audience for a web site, an audience-specific organization scheme may make sense.
• It also works best when the site is frequented by repeat visitors who can bookmark their particular section of the site.
• It breaks a site into smaller, a clutter-free page, audience-specific mini-sites to present only the options of interest to particular audience.
Metaphor organization
• It is commonly used to help users understand the new by relating it to the familiar.
• Example: we are familiar with the desktop computer with its folders, files and trash can/recycle bin.
• Metaphor can help users understand content and function intuitively.
• It can also generate new and exciting ideas about the design, organization and function of the web site.
Hybrids (Multiple) organization
• Many web sites successfully combine topics and tasks on their main page and within their global navigation.
• This reflects the reality that typically both the organization and its users identify finding content and completing key tasks at the top of their priority lists.
• As long as the schemes are presented separately on the page, they will retain the powerful ability to suggest a mental model for users
How is about Organization Structures?
Organization structures
• It plays an intangible yet very important role in the design of web sites.
• Movies are linear in their physical structure, Maps are a spatial structure, while web sites are Hierarchy, Database-oriented model and Hypertext.
• Each organization structure possesses unique strengths and weaknesses.
The hierarchy: a top-down approach
• All good information architectures is ha well-designed hierarchy or taxonomy.
• We have organized information into hierarchies since the beginning of time.
• Family trees and organization charts are hierarchical.
• Example: we divide books into chapters into sections into paragraphs into sentences into words into letters.
The hierarchy: a top-down approach
• Hierarchy is ubiquitous in our lives and informs our understanding of the world in a profound and meaningful way.
• Users can easily and quickly understand web sites that use hierarchical organization models.
• It is able to develop a mental model of the site’s structure and their location within the structure, this provides context that helps users feel comfortable.
Plants
Flowers Trees
Conifers Deciduous
Annuals Perennials
The hierarchy: a top-down approach
• But it is important to consider the balance between breath and depth in your taxonomy.
• Breadth refers to the number of options at each level of the hierarchy.
• Depth refers to the number of levels in the hierarchy.
• If a hierarchy is too narrow and deep, users have to click through an inordinate number of levels to find what they are looking for.
• If a hierarchy is too broad and shallow, users are faced with too many options on the main menu and are surprised by the lack of content.
Page A
Page B
Narrow and Deep6 clicks from A to B
Broad and Shallow10 main page options for 10 content items
Consider the balance between breadth and depth taxonomy
• We should be sensitive to people’s visual scanning abilities and to the cognitive limits of the human mind
• The number of links you can safely include is constrained by user’s abilities to visual scan the page rather by their short-term memories
• Recognize the danger of overloading users with too many options
• Group and structure information at the page level
• Subject your designs to rigorous user testing
Microsoft’s Main page
• Roughly 67 links
• Global navigation (5)
• Primary Taxonomies (47)
• Marketing (5)
• Downloads (3)
• Search (4)
• Support (3)
Yahoo Hong Kong’s Main page
• Roughly 88 links
• Global navigation (7)
• Yahoo’s products (32)
• Advertisements (17)
• Marketing (8)
• Search products (19)
• News (5)
The database model: a bottom-up approach
• It is defined as a collection of data arranged for ease and speed of search and retrieval.
• A simple flat file database: an individual contact and record. The record contains several fields, such as name, address, and telephone number.
• In a computer-based contact management system, we can search and sort using other fields.
C
Name : Jane Chan
Address: 101 Nathan Road
Phone: 1234-5678
Fax: 8765-4321
Email: [email protected]
A Relational Data Base
• Data is stored within a set of relations or tables
• Row in the table represent records and columns represent fields
• Example: au_id & title_id fields within the Author_title table act as keys linking the data stored separately in the Author and Title tables
An entity relationship diagram (ERD)
• Metadata is descriptive information about data and documents (such as origin, size, formatting or different characteristics of a data)
• Metadata is the primary key that links information architecture to the design of database schema
• By tagging documents and other information, we enable powerful searching and browsing
• Content Management System (CMS)
Hypertext
• A highly nonlinear way of structuring information
• The items/chunks of information that will be linked and the links between those chunks
• But it presents substantial potential for complexity and user confusion
• Because hypertext links reflect highly personal associations
• It can’t create a mental model of the site organization. Without context, users can become frustrated
• Hypertext is rarely a good candidate for the primary organization structure
Recap the Organization Systems
• The first step in transforming data into information is exploring its organization – Nathan Shedroff, Experience Designer
• Exact Organization Schemes vs. Ambiguous Organization Schemes
• EOS are best for known-item searching, while AOS are best for browsing and associative learning
• Think about the organization structures that influence how users can navigate through these schemes. Should you use a hierarchy, structured database model work best?
• Keep in mind that large web sites typically all three types of structure.
How we organize information, whether it’s on the web or in a library, is a balance between how information “want” to be
organized and how users want to find it.
Case study: Vietnam Veterans’ Memorial – “The Wall”design by Maya Lin
Title: Vietnam Veterans Memorial
Location: Washington, D.C.,
Year: 1982
Material: Black granite
Dimensions: 246 X 10.5(h) feet per each wall
Vietnam Veterans Memorial
Vietnam Veterans Memorial
• Approximate 58,000 dead soldiers who officially died during Vietnam War
• It is originally a statistical chart of deaths over time during the period from 1959 to 1975
• The organization is critical to the shape, form, and evocative nature of the memorial
• The soldiers’ names be listed by date of death rather than alphabetically
Vietnam Veterans Memorial
• Because war veterans would find their story told, and their friends remembered, in the panel that corresponded with their tour of duty in Vietnam
• Alphabetical listing would make the Memorial look like a telephone book engraved in granite, destroying the sense of unique loss that each name carried
• It generates the connection /emotional and relationship that was inherent in the organization
Vietnam Veterans Memorial
The names on stone triple-function:
• To memorialize each person who died
• To make a mark adding up the total
• To indicate sequence and approximate date of death
Name Rank Service Birth Date Death Date Home Town Panel Line Number
Vietnam Veterans Memorial, Directory of Names