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Tripmedia's GUI development philosophy adopts a Performance Centric Design (PCD) approach*. This enables scenario based analysis and testing of design specifications to outline user interface requirements. This allows for a new form of interaction between user tasks and software design based on a consideration of issues such as platforms, system capabilities and user constraints.

The pre-development tasks at each phase are highlighted as follows:

This phase determines the product scope & objectives, and involves an analysis of platforms, data structures, and data flows. Detail functional specifications and high level technical specifications are outlined to determine the relationship between various components/entities of the system.
Discuss/Determine product objectives with development team:
Based on user requirements, the GUI design team outlines scenarios and storyboards which highlight product features & constraints, performance issues and user interaction. This forms the basic "vision" for the product.

These include Flowcharting tasks :

creating a task chart that presents tasks in sequence, identifies their
frequency, details input requirements, details display requirements, and
contains comments on what users might want to do at each step.
creating storyboards
Create UI mockups
User interface mockups of the product are created as early as possible, and feedback is elicited from users. These mockups can illustrate such things as page types and navigation menu bar designs.
Hold a UI design marathon
The GUI Design Team brings a sampling of performers and developers together in a room for a marathon session that results in the creation of an actual GUI model in a few days.
Conduct UI walkthroughs
Following a GUI design marathon, a series of GUI walkthroughs takes place based on the developed task analyses and redesigned workflow. Errors, confusion, complexity, and uncertainty are noted and incorporated into improved iterations of the design.
Create a style guide
Style guides are created to ensure the consistency of the interface and the efficiency of the coding effort. In cases where style guides already exist, modifications based on user taks can be incorporated. The style guide documents rules for menus/navigation, screens, dialog boxes, messages, etc. This ensure that simplicity, learning, cohesion, and ease of use is implemented in the application design.
The design phase establishes detailed product specifications. The GUI is clarified in detail and communicated to the development team.
Create prototypes
Prototypes are like mockups and storyboards except that they simulate the proposed GUI design and exhibit partial functionality.
Usability testing
Each prototype is then tested using scenario based usability standards.
Detailed UI design
The GUI is evaluated with each iteration, and the conceptual model is further clarified, to formulate a detailed UI design document. This would specify the following:
Fully developed menu bar.
Design of all pages. Knowledge that needs to be embedded in these pages
is also specified.
Specifications of all pathways between menu/buttons and pages.
Update the style guide
The feedback from the prototyping/usability sessions forms the basis of the final design of the interface. The style guide are refined, if necessary, to reflect final design decisions.
* Marion.C. 1997. Implementing Performance Centered Design
Copyright 2005 Tripmedia Pvt.Ltd.All rights reserved.