ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Sample Information System Functional ERD

Updated on December 4, 2011

A functional Entity Relationship Diagram helps system designers visualize the relationships among entities comprising a system. This weekly paper documents an ERD built from the requirements presented in a scenario comprising the functionality for a university data system to track concerts.

This system comprises five entities with their associated attributes. An entity’s attributes describe the entity and help to distinguish that entity from another entity of similar type. The five entities and attributes for the UCIS are as follows:

• venue with a name attribute

• concert with a date attribute

• conductor with last name and first name attributes

• music with a composition-date attribute

• composer with last name and first name attributes

The interactions between these entities are determined by the business rules for the system. The business rules specified by the university are as follows:

• A venue has a concert.

• A conductor conducts a concert.

• A concert includes a piece of music.

• A composer composes a piece of music.

Developers need to understand the interaction between the entities in order to design a functional system. Modeling the system provides the visualization to help ensure the developers and stakeholders understand these interactions. A functional Entity Relationship Diagram (ERD) is one type of model that serves this purpose. “ER diagrams have three core constructs – entities, attributes, and relations that are combined to specify a problem’s elements and their relationships” (Pfleeger and Atlee, 2006, p. 158).

This representation of an ER presents entities as rectangles, attributes as ovals connected to the entities, and relations as diamonds connected between the entities. The UCIS Functional ERD shown in Figure 1, below, depicts the University Concert Information System.

Figure 1: UCIS Functional ERD
Figure 1: UCIS Functional ERD

As shown in the diagram, each of the entities is visually presented along with the attributes that describe them. The relationships between the entities are clearly visible.  Developers and stakeholders can easily come to agreement concerning the functionality of the system by referring to the diagram.

The successful design of a system depends on communication between developers and stakeholders, and understanding of the system requirements by all concerned parties.  Diagrams and models like the ERD facilitate development by aiding that communication and understanding.


Pfleeger, S., L., and Atlee, J., M. (2006). Chapter 4 capturing the requirements. Software Engineering Theory And Practice (3rd ed.). Upper Saddle River, NJ: Pearson Education Inc.


    0 of 8192 characters used
    Post Comment
    • profile image


      7 years ago

      This is the second time I have run across your page in reference to school work. Thanks for taking the time to put your work out here on the internet. I am sure I'm not the only one who appreciates it.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)