CpSc 881

Project 1

Real-time Embedded Software

Part 2 – Quality Attributes for the Wireless Device

The software for which we are designing an architecture must exhibit specific qualities either upon examination or upon execution. In this exercise you will explore possible quality attributes, ways of achieving those attributes through the architecture. We will consider several techniques that must be applied during this phase of architecture development.

Quality of Service (QoS) constraints

The system must satisfy the following quality constraints

• Maximize battery life
• Minimize time to add new type of service
• Provide near real-time display of WML pages
• Provide real-time display of clock/battery information
• Provide for the display of a variety of icons to indicate various states such as silent operation

The quality attributes must achieve these Quality of Service Constraints.

Activities

• Create a table of quality attributes for the wireless device
• Prioritize the attributes (Outside the table justify the rankings)
• Describe how it might be achieved in the wireless device
• Define how each attribute will be measured
• Read the tech report on Quality Attribute Workshops
• Prepare at least three test cases for the architecture

Attribute name

Priority

How Achieved

Computation

Evaluation Criteria – worth 3 pts

• The appropriateness of the attribute rankings
• The exactness by which the attributes can be measured
• The completeness of the test case descriptions

Constraints

• This is a two person assignment
• This assignment is due in the computer science office by noon, Monday, Feb 4^th

Resources