Requirements Analysis Document Presentation Brian Woo User Interface Subsystem PAID Project Fall 1998

General Goals Provide set of interfaces for scenarios presented in problem statement Provide standards for communication between end-users and external subsystems

Current System WIS EPC (Electronic Parts Catalog) VISTA Reynolds-Reynolds

Proposed System Graphical interface for end-user interaction with PAID system Style guide for all interfaces within PAID

Functional Requirements User-friendly interface display data handle processing/requesting of data Ability to work efficiently disconnected mode (info from local db) connected mode (info from MBNet) Ability for users to set preferences

User Interface/Human Factors Wide range of users Multiple languages/cultures Different platforms to be run on desktop PC portable device

Documentation Extensive online help system Multimedia or paper tutorials Reference manuals

Hardware Consideration Use of Java Virtual Machine Storage capacity Connectivity

Performance Characteristics Speed download display Storage Space

Error Handling/Extreme Conditions Detection Display

System Interfacing Input Output user input devices visual display audio signal

Quality Issues Reliability Portability

System Modifications New/improved input devices New languages/cultures Change according to user feedback Change according to change in PAID

Physical Environment Location Environmental factors office garage off-site repair location Environmental factors noise dirt physical shock

Security Issues Level of access per individual Two forms of access

Resource Issues Installation

System Model Use case : local database update Actors : use case initiated by Bratt, who communicates with the server Description : PAID prompts Bratt to update the local database. Bratt delays download. Later, Bratt downloads and receives message confirming update.

Local Database Update Server Download_Control Bratt Get network load high low start download download finished Bratt PAIDSystem_Interface Communication DelayedDownload_Control initiates starts login panel log in yes, download now creates server ready prompt for download N bytes finished download status Display status Local Database Update See screen sequence for details of the login process Bratt can access the local database anytime no, not now

System Model (cont’d) Login process : Terminate program Successfully connected Network error Authentication error Ok pressed Login name: __________ Password : __________ OK Login dialog Connecting… Since it takes a long time to connect to the server, display some message describing what’s happening. Display the error and propose to try again or close the program. The user chooses to close the program.

System Model (cont’d) Download process : Level 1: Gauge Level 2: Window A small gauge is displayed at the bottom. The percentage of data downloaded is written on it. Displayed: Percentage Time left Displayed: Percentage Time left Check list Cancel More > Close Close pressed/Close Window < Less Download over Package one – ok Package two – ok Package three – in progress Package four – Package five – … Presses Cancel/stop downloading Presses Less/resize window Download over Cancel

Issues Push vs. pull information Accomodation of languages/cultures Windows widgets vs. custom interface Hardware for mobile garage scenario Etc., etc...