Key Principles of Lean Flashcards
The 3 basic elements of TPS are:
The 3 basic elements of TPS are:
- Just In Time production
- Quality
- Continual Improvement
The essence of Lean is:
The essence of Lean is:
- delivering value to the customers, and
- continuously improving the ability to do this, by
- removing waste from the entire system that produces the value.
Value:
Value:
- is defined by the customer (voice of the customer), and - - represents the requirements that a customer has regarding a specific product or service delivered.
A Value Stream is comprised of:
A Value Stream is comprised of:
- All tasks and activities used to bring a product or service from concept to customer, and
- includes all information, work and material flows.
Flow means
Flow means:
That the activities must follow each other with minimal interruptions and minimal intermediate stockpiles.
This means designing the flow so each unit that enters the flow is carried out to its conclusion without interruption.
Flow means working with a so-called ‘single-piece flow’. each unit of work goes through the process of its own.
This is the opposite of working batches where multiple units of work are process through a particular step together.
Flow is interrupted mostly by the following types of waste:
Flow is interrupted mostly by the following types of waste:
- Handoffs
- Inspections
- Waiting Times
Flow is about getting the right materials and the right information to the right people, with the right skills, in the right place, at the right time, every time, in short:
Flow is about getting the right materials and the right information to the right people, with the right skills, in the right place, at the right time, every time, in short:
Just In Time.
The essence of pull is
The essence of pull is:
The customer can trigger the value stream when the value is required.
A Pull Production System is
A Pull Production System is:
one that explicitly limits the amount of work in the process that can be introduced into the system.
Nothing is to be produced until the next process really requires it. For service industries like IT, this is less problematic than for production industries, since a service is consumed as its produces and is generally stared when requested by the customer.
What is the essence of perfection?
What is the essence of perfection?
Doing things right the first time.
Waste within IT includes the traditional categories: TIMWOOD and one additional (T)
Timwood
- Transportation: Movement of work product, information, materials.
- Inventory: Work in progress, having more than strategic levels of products.
- Motion: Unnecessary physical movement.
- Waiting: Stopping or slowing down for work to arrive.
- Overproduction: Producing more or sooner than is needed.
- Over Processing: Excessive or unnecessary work.
- Defects: Reworking to correct mistakes, inspection and scrap.
Talent: Unused human creativity and potential
In addition to traditional definitions of waste (or Muda) there are 2 other categories of waste:
In addition to traditional definitions of waste (or Muda) there are 2 other categories of waste:
Mura - Variability
Muri - Overburden
Mura (variability) occurs:
Mura (variability) occurs: when incoming work is nog matched by the right number of people with the appropriate skills, thus leading to a wide range of possible outcomes in quality.
Muri (overburden) is caused by
Muri (overburden) is caused by fixed service timeframes, release windows and other such time constrains.
There are five key principles that can be used as a guideline for driving improvements within an organisation.
There are five key principles that can be used as a guideline for driving improvements within an organisation.
- Customer Value
- Understand the value Stream that creates the value
- Create Flow in the process
- Integrating Pull into Value Stream
- Perfection
