Lean Software Engineering

• Kanban regulates work, not workers.
• Every process is a queue, not just the buffers.  Workflow buffers can be in time, space, or capacity. Each is a tool, none are “correct.”
• Behold! The mighty Invariant. http://tinyurl.com/dyhelw
• A Minimum Marketable Feature is the smallest unit of work that has recognizable value to the customer. If a Minimum Marketable Feature could be made any smaller, then either it wasn’t Minimum, or it no longer has value to the customer. The Minimum Marketable Feature is the most natural unit of scheduling for Lean and Evolutionary Development.  The Minimum Marketable Feature is the most valuable product of Rolling Wave Planning.  A Minimum Marketable Feature can be decomposed into User Stories, Use Cases, BDD Scenarios, etc. for detailed work scheduling.  Minimum Marketable Features can be staggered and overlapped for production leveling of skills and roles.  A Sprint Goal is a substitute for having a real business-valued goal. A Minimum Marketable Feature is the real thing.
• The “Feature Crew” process is a kanban system for Minimum Marketable Features.  A Feature Crew system can scale up to hundreds of people.
• Alan Shalloway on future of Lean software development: http://tinyurl.com/b3q6f5
• In Evolutionary Design, the same requirement may be implemented more than once. This is not rework, because no mistake has been made.
• Bottom up: A Design Parameter is “what the system does.” A Functional Requirement is “why the system does it.”  Top down: A Functional Requirement is “what the system should do.” A Design Parameter is “how the system will do it.”
• I find greater value in the ideas of Deming, Ohno, and Goldratt. I am not the only person who feels this way.
• One man’s good engineering practice is another man’s criminal negligence.
• If continuous testing and continuous integration are good, then continuous planning might also be good: http://is.gd/m98c
• My opinion of Peter Middleton and James Sutton’s book “Lean Software Strategies” only grows over time. http://is.gd/lFgb
• The purpose of business is not to give programmers something to do.

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