By James O. Coplien, Gertrud Bjørnvig

More and extra Agile initiatives are searching for architectural roots as they fight with complexity and scale - and they're looking light-weight how one can do it

Still seeking? during this ebook the authors assist you to discover your personal path
• Taking cues from Lean improvement, they could support steer your venture towards practices with longstanding song records
Up-front architecture? definite. you could convey an structure as code that compiles and that concretely publications improvement with out bogging it down in a mass of files and guesses concerning the implementation
Documentation? Even a whiteboard diagram, or a CRC card, is documentation: the aim isn't to prevent documentation, yet to record simply the correct issues in precisely definitely the right amount
Process? This all works in the frameworks of Scrum, XP, and different Agile ways

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Extra info for Lean Architecture: For Agile Software Development

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Lean architecture should be rooted in the thought processes of good domain analysis, in the specialization of deeply knowledgeable domain experts, and once in a while on de facto, community, or international standards. ’’ Why is this a ‘‘secret’’? Because it seems that teams that call themselves Agile either don’t know it or embrace it only in part. Too often, the ‘‘lazy’’ side of Lean shines through (avoiding excess work) while teams set aside elements of social discipline and process. Keeping the ‘‘everybody’’ part secret lets us get by with talking to the customer, which has some stature associated with it, while diminishing focus on other stakeholders like maintenance, investors, sales, and the business.

Development teams can build such models in about one Scrum Sprint: a couple of weeks to a month. Design-by-contract, used well, gets us closer to running code even faster. Going beyond this expression of form with too much structure (such as class implementation) is not Lean, slows things down, and leads to rework. We can express complex system functionality in use cases. Lightweight, incrementally constructed use cases help the project to quickly capture and iterate models of interaction between the end user (actor) and the system, and to structure the relationships between scenarios.

And maybe those of you who are practicing Scrum confuse Lean with Scrum or, worse, confuse Agile with Scrum. Scrum is a great synthesis of the ideas of Lean and Agile, but it is both more and less than either alone. Perhaps some clarification is in order. This section is our contribution to those needs. This book is about a Lean approach to architecture, and about using that approach to support the Agile principles. Our inspirations for Lean come through many paths, including Scrum, but all of them trace back to basics of the Lean philosophies that emerged in Japanese industry over the past century (Liker 2004): just-in-time, people and teamwork, continuous Introduction improvement, reduction of waste, and continuous built-in quality.

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