agile & lean in context

Agile & Lean in Context

Presented By: Chad Pavliska

Topic

• What is the difference between Lean, Agile, and Scrum?

• Where did these terms come from?

Quick Bio - Chad Pavliska

• 15 years in technology industry (10 in development)

• “Product Coach” - Ship product!

• Freelance & Jackrabbitmobile

• Mobile specialty

• Follow me @chadpav

• Email: chadpav@gmail.com

– Chad Pavliska

“I do manage projects but don’t call me a project manager.”

Agile Experience• 2002 - Software Developer / DBA (Learned

XP)

• 2007 - First exposed to Scrum (failed)

• 2009 - Successful implementation

• 2012 - Lean Startup, Studied history of Lean Manufacturing, Agile, and Scrum

• Present - 2 Scrum projects in progress

Lean -> Agile Timeline

• 1950’s - Toyota Production System (TPS) (Taiichi Ohno)

• 1990’s - Westerners begin to document TPS and label it Lean Manufacturing (John Krafcik)

• mid-90’s - Several “light” methodologies using lean principles exist in parallel (Scrum, XP, Crystal, etc.)

• 2001 - Agile Manifesto written to document similarities in software development methodologies

Lean Manufacturing

– W. Edwards Deming (circa 1950)

“…the bulk of the causes of low quality and low productivity belong to the

system and thus lie beyond the power of the work force.”

Toyota Production System

NUMMI Plant

… now a Tesla Factory

May 2010 - Model S production

– Wiki page on Lean Manufacturing

“Lack of understanding is one of the key reasons that a large share of lean manufacturing projects in the west fail

to bring any benefit.”

AGILE

- Chazz, Blades of Glory (2007)

Agile Software Development

• 2001 - 17 software developers gathered in Snowbird, Utah

• Goal: Outline similarities between different “lightweight” methods (Scrum, XP, Crystal, etc.)

• Published The Agile Manifesto

• Four Agile Values

• Twelve Agile Principles

– David Hawks (@agileaustin), CEO of Agile Velocity

“Agile is a set of values and principles, it doesn’t define your process.”

Four Agile Values• Individuals and interactions over

processes and tools

• Working software over comprehensive documentation

• Customer collaboration over contract negotiation

• Responding to change over following a plan

* While there is value in the items on the right, we value the items on the left more.

Twelve Principles (paraphrased)

1. Deliver value early

2. Embrace change

3. Deliver frequently

4. Collaborate (business and technical)

5. Motivated individuals

6. Face-to-face conversation

Twelve Principals - Cont.

7. Working software is primary measure of progress

8. Sustainable development (pace)

9. Technical excellence

10.Maximize work not done (simplify)

11.Self-organizing teams

12.Reflect and Adapt regularly

– Martin Fowler

“…lean and agile are deeply intertwined in the software world. You can't really talk about them being alternatives, if

you are doing agile you are doing lean and vice-versa.”

SCRUM

Scrum Framework

• Early ’90’s - Schwaber and Sutherland began experimenting w/ techniques that evolved into Scrum

• 1995 - Scrum methodology paper (Ken Schwaber & Jeff Sutherland)

• 2001 - Agile Software Devlopment with Scrum Book (Schwaber & Mike Beedle)

Scrum Theory• Founded on empirical process control

theory (Empiricism)

• Three pillars of empiricism:

• Transparency

• Inspection

• Adaptation

Scrum Events

• 4 Formal Events:

• Sprint Planning

• Daily Scrum

• Sprint Review

• Sprint Retrospective

The Scrum Team

• Product Owner

• The Development Team

• Scrum Master

Scrum Artifacts

• Product Backlog

• Sprint Backlog

• Definition of “Done”