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Agile Architecture

Molly Dishman and Martin Fowler

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 06, 2015

An interesting keynote from Molly Dishman and Martin Fowler, on the changing role of architecture.

Takeaways

  • Diffusion of Architectural Responsibility
  • We no longer need architects, technical leads are doing the architecture?

Q. How do we make sure that 'architecture' is still happening?

It is important to pay that continuous . . .

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Architecting Continuously Testable Systems

Testability Quality Factor for Continuous Delivery in Digital Systems

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 06, 2015

TL;DR; When we architect systems using automated testing and test-first approaches, we quickly see testability constraints move to our system boundary. Low testability quality factor in external services is a key constraint on our ability to continuously prove our system is in a state of production readiness. We require external systems to . . .

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Legacy Architecture and Testability

Manual Test Teams and Testability Architectural Debt

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 05, 2015

The architecture of specification subsystems has always been critical to quality factors like cycle time -

Industry estimates indicate that between 30 and 50 percent (or in some cases, even more) of the cost of developing well-engineered systems is taken up by testing. If the software architect can reduce this cost, the payoff is large. . . .

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Functional Design Focus

Architectural Anti-Patterns

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 04, 2015

This describes the concept of a functional-only architectural focus, an extreme example, where architects consider only their functional domain. Here, only half of the system being built is actually being consciously 'designed', the remainder is being evolved by development teams (who may or may not know how to architect large suites . . .

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Quality Factors for SOA

Service-Oriented Architecture and Architectural Quality Factors

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 04, 2015

In the context of Service-Oriented Architecture, early work from [O'Brien et al, 2005] discusses the importance of quality attributes -

Software architecture is the bridge between mission/business goals and a software-intensive system. Quality attribute requirements drive software architecture design. Choosing and designing an . . .

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Architectural Quality Factors

Software Architecture in Practice

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 04, 2015

Recap on extrinsic quality factors

Extrinsic quality factors are key concepts for business and architecture stakeholders. [Bass et al, 2013] use quality factors to describe the architectural characteristics of a system -

availability, modifiability, performance, security, testability, and usability

as well as...

qualities, such as . . .

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Heuristics for testability

Some tips from Eberhardt Rechtin

Ken McCormack

Software Developer | Application Architect | Audio Engineer

April 03, 2015

On the design of testable systems, Rechtin provides us with several heuristics [Rechtin, 1991] -

To be tested, a system must be designed to be tested

This sounds self-evident, yet, within many architecture silos, a view persists that testability is the concern of development and testing teams. Are they missing something?

The test setup for . . .

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