The architecture tradeoff analysis method

This paper presents the Architecture Tradeoff Analysis Method (ATAM), a structured technique for understanding the tradeoffs inherent in the architectures of software-intensive systems. This method was developed to provide a principled way to evaluate a software architecture's fitness with respect to multiple competing quality attributes: modifiability, security, performance, availability, and so forth. These attributes interact-improving one often comes at the price of worsening one or more of the others-as is shown in the paper, and the method helps us to reason about architectural decisions that affect quality attribute interactions. The ATAM is a spiral model of design: one of postulating candidate architectures followed by analysis and risk mitigation, leading to refined architectures.

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