Lean principles and practices

Lean Principles and

Practices

Origins

The Toyota Production System

Taiicho Ohno

Jidoka

Just-In-Time

Shigeo Shingo

Zero-Inspection

Non-Stock Production

Deming cycle

DoCheck

Some japanese

7 Principles

The 7 base principles of lean software development

7 Principles

Eliminate waste

Build Quality in

Create Knowledge

Defer Commitment

Deliver fast

Respect People

Optimize the whole

Eliminate waste

Identify

Value adding

Non-value adding

Value stream mapping

Build Quality In

Inspection

Jidoka

Encapsulation

Create Knowledge

Enable Feedback Cycles

Kaizen

Retrospectives

Defer Commitment

Set based development

Real Options

Architectural Decisions

Deliver fast

Sears vs LL. Bean

Incremental Delivery

Repeatability

Respect People

Teamwork

Responsibility-Based

Planning

Control

Empower People

Optimize the whole

Concept to Cash

Value Stream

Investigate Failure Demand

The 7 wastes in software development

Inventory

Uncoded documentation

Untested code

Undeployed code

november 2010

december 2010

januari 2011

februari 2011

maart 2011

april 2011 mei 2011 juni 2011 juli 2011 augustus 2011

september 2011

oktober 2011

2010 2011

Lines Added Lines Modified Lines Deleted Bug Count

Release

Overproduction

Always Often Sometimes Rarely Never

Extra processing

Gold plating

Not Invented Here Syndrome

Frameworks

Transportation

Handoffs of knowlegde

Waterfall mindset

Motion

Context switiching

1 2 3 4 5

Number of “tasks"

Time spent on value adding tasks

Delays

Signoff gates

Reviews

Defects

Prevent rather than detect

Failure demand

Stress on your system

Avoid stress

Think about this:

CPU at 100%

Highway at 100%

Pull based scheduling

Reponsibility based

commitment

Pull instead of push

Example

Identify and fix bottlenecks

Avoid bottlenecks

Identify bottlenecks

Reduce intake

Fix bottleneck

Increase intake

Visualize your flow

References

http://jellebens.blogspot.com/

Lean principles and practices

Technology

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