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© Telelogic AB Trade Studies with Focal Point ®
© Telelogic AB Discuss Trade Studies on the design of a JTRS Radio Design
© Telelogic AB Trade Studies in Focal Point Need a team solution – spreadsheets are for individuals. Need the trade study to be integrated into DOORS Need a common methodology for architectural decisions Need a means to document the trade study
© Telelogic AB Architectural Trade Study I Analysis of Design Alternatives When designing a system, an experienced engineer will recognize alternate design choices at the system and subsystem levels. Each design alternative has its own cost, schedule, skill, performance and customer value implications. Design alternatives must be considered against these dimensions to pick the best alternative. Use trade studies to compare and select the optimal design alternative.
© Telelogic AB Architectural Trade Study II Component/Subcomponent Selection When designing a complex systems, software libraries, hardware components, sensors, or subsystems are often outsourced. Each vendors offering can be compared based on its cost, reliability, availability, key performance attributes, and integration requirements. For example, an infrared sensor subcomponent may be compared on the sensing distance, granularity of image, contrast sensitivity, power requirements, availability, reliability, and cost. Use trade studies to compare and select the best vendors product for the design.
© Telelogic AB Allocation of Requirements to Releases (Feature Prioritization) Complex systems are typically delivered in staggered releases. Allocation of features to releases is based the priority of functional behavior. How can we specify the inter-dependencies of requirements then intelligently allocate requirements to a set of staggered releases? Use Analytical Hierarchy Process to assess and assign a relative priority to the independent system requirements.
© Telelogic AB Seven Step Trade Study Methodology 1. Write TS Description, Criteria, and Alternatives in DOORS 2. Mark Alternatives with Trade Study enumeration in DOORS 3. Create Filter and View for each TS in DOORS 4. Create a Module in FP for each TS, create attributes to hold criteria values and normalized scores 5. Add the TS criteria to the FP Criteria module 6. Pairwise Comparisons to determine criteria weights 7. Visualize the results, scenarios analysis, sync to DOORS
© Telelogic AB Trade Studies in Focal Point Need a team solution – spreadsheets are for individuals. –Focal Point has a backend database and web based interface for team collaboration! Need the trade study to be integrated into DOORS –Focal Point and DOORS have a flexible, bi-directional data synchronization Need a common methodology for architectural decisions –Focal Point & DOORS have a 7 step methodology for Trade Studies Need a means to document the trade study –Results and visualizations can be exported for documentation
© Telelogic AB Use Focal Points web interface to manage Trade Studies
© Telelogic AB Visualize the Trade Study result of Vendors versus Criteria
© Telelogic AB Prioritize Criteria Weights and Qualitative Criteria Values using Pairwise Comparisons
ATAM Architecture Tradeoff Analysis Method
COMP1007 Introduction to Requirements Analysis © Copyright De Montfort University 2002 All Rights Reserved COMP1007 Introduction to Requirements Analysis.
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