Archive for the ‘5S’ Category

How Toyota uses 5s

Monday, March 8th, 2010

5s in 5 minutes

Developed in Japan, this method assume no effective and quality job can be done without clean and safe environment and without behavioral rules.

The 5S are five action verbs (Sort, Clean, Set in order, Standardize and Progress), all starting with an S in Japanese (Seiri, Seiton, Seiso, Seiketsu, Shitsuke). The name “Five S” now identify this method.

The 5S allow to set up a well adapted and functional work environment, ruled by simple yet effective rules.

5S deployment is to be done in a logical and progressive way. The 3 first S are shop floor actions, while the 2 lasts are sustaining and progress actions.

Apparently simple, the 5S are a consistent and powerful set. Their correct deployment allows change and progress far beyond just perform cleaning (or order the cleaning to be done).

5S are the solid base, the foundation on which to build continuous improvement, install lean manufacturing tools and methods. They are also an effective lever for change management and empowerment.

Efficient work and quality require clean environment, safety and discipline.
5S are simple, effective rules for tidiness.

Principle of 5S

The 5S are prerequisites for any improvement program. The basic assumption states “wastes are potential gain, eliminating wastes is a gain”.
The 5S philosophy is a way of thinking, focusing on effective work place organization, simplified work environment, strives waste reduction while improving quality and safety.
There is no chance for efficiency or quality improvement within dirty work place, waste of time and scrap.

The five S stand for the five first letters of these Japanese words:

Meaning

Seiri Sorting Out
Seiton Systematic Arrangement
Seiso Spic and Span
Seiketsu Standardizing
Shitsuke Self-discipline

It is recommended to start implementing 5S in a well chosen pilot workshop or pilot process, and spread to the others step by step.

Lets see how Toyota does

PS. I got the pictures from this site excellent blog about TQM.

image001
image011
image013
image014
image016
image017
image018
image019
image020
image021
image0121
image022

Value Stream Mapping method – Ohno, Shingo 5s Identifying and decreasing waste

Monday, March 8th, 2010

0220250801003

The Value Stream Mapping method (VSM) is a visualization tool oriented to the Toyota version of Lean Manufacturing (Toyota Production System). It helps to understand and streamline work processes using the tools and techniques of Lean Manufacturing. The goal of VSM is to identify, demonstrate and decrease waste in the process. Waste being any activity that does not add value to the final product, often used to demonstrate and decrease the amount of ‘waste’ in a manufacturing system. VSM can thus serve as a starting point to help management, engineers, production associates, schedulers, suppliers, and customers recognize waste and identify its causes. As a result, Value Stream Mapping is primarily a communication tool, but is also used as a strategic planning tool, and a change management tool.

In order to do this, the Value Stream Mapping method visually maps the flow of materials and information from the time products come in the back door as raw material, through all manufacturing process steps, and off the loading dock as finished products.

Mapping out the activities in the manufacturing process with cycle times, down times, in-process inventory, material moves, information flow paths, helps to visualize the current state of the process activities and guides towards the future desired state.

The process usually includes the physically mapping of the “Current State” while also focusing on where you get to, or the “Future State” map, which can serve as the foundation for other Lean improvement strategies.

History of VSM: The use of waste removal to drive competitive advantage inside organizations was pioneered in the 1980s by Toyota’s chief engineer, Taiichi Ohno, and sensei Shigeo Shingo and is oriented fundamentally to productivity rather than to quality. The reason for this is thought to be that improved productivity leads to leaner operations which help to expose further waste and quality problems in the system. Thus the systematic attack on waste is also a systematic assault on the factors underlying poor quality and fundamental management problems. The seven commonly accepted wastes in the Toyota production system were originally (reformulation by Jones between brackets):

1. Overproduction (faster-than-necessary pace)
2. Waiting
3. Transport (conveyance)
4. Inappropriate processing
5. Unnecessary inventory (excess stock)
6. Unnecessary motion
7. Defects (correction of mistakes)

Peter Hines and Nick Rich have suggested the following Seven Value Stream Mapping tools (Article: “The seven value stream mapping tools” – International Journal of Operations & Production Management, Vol. 17, No. 1, 1997, pp. 46-64.):

1.Process activity mapping {Origin: Industrial Engineering}
2. Supply chain response matrix {Origin: Time compression/logistics}
3. Production variety funnel {Origin: Operations Management}
4. Quality filter mapping
5. Demand amplification mapping {Origin: Systems Dynamics}
6. Decision point analysis {Origin: Efficient Consumer Response/logistics}
7. Physical structure mapping