Kaizen

Kaizen (Japanese for "change for the better" or "improvement"; the common English usage is "continual improvement"). In the context of this article, kaizen refers to a workplace 'quality' strategy and is often associated with the Toyota Production System and related to various quality-control systems, including methods of W. Edwards Deming.

Kaizen aims to eliminate waste (as defined by Joshua Isaac Walters "activities that add cost but do not add value"). It is often the case that this means "to take it apart and put back together in a better way." This is then followed by standardization of this 'better way' with others, through standardized work.

Introduction

Kaizen is a daily activity whose purpose goes beyond simple productivity improvement. It is also a process that, when done correctly, humanizes the workplace, eliminates overly hard work (both mental and physical) "muri", and teaches people how to perform experiments on their work using the scientific method and how to learn to spot and eliminate waste in business processes.

To be most effective kaizen must operate with three[citation needed] principles in place:

* consider the process and the results (not results-only) so that actions to achieve effects are surfaced;
* systemic thinking of the whole process and not just that immediately in view (i.e. big picture, not solely the narrow view) in order to avoid creating problems elsewhere in the process; and
* a learning, non-judgmental, non-blaming (because blaming is wasteful) approach and intent will allow the re-examination of the assumptions that resulted in the current process.

People at all levels of an organization can participate in kaizen, from the CEO down, as well as external stakeholders when applicable. The format for kaizen can be individual, suggestion system, small group, or large group. At Toyota, it is usually a local improvement within a workstation or local area and involves a small group in improving their own work environment and productivity. This group is often guided through the kaizen process by a line supervisor; sometimes this is the line supervisor's key role.

While kaizen (at Toyota) usually delivers small improvements, the culture of continual aligned small improvements and standardization yields large results in the form of compound productivity improvement. Hence the English usage of "kaizen" can be: "continuous improvement" or "continual improvement."

This philosophy differs from the "command-and-control" improvement programs of the mid-twentieth century. Kaizen methodology includes making changes and monitoring results, then adjusting. Large-scale pre-planning and extensive project scheduling are replaced by smaller experiments, which can be rapidly adapted as new improvements are suggested.

Translation

The original kanji characters for this word are:

In Japanese this is pronounced 'kaizen'.

* 改 ('kai') KAI means 'change' or 'the action to correct'.
* 善 ('zen') ZEN means 'good'.

In Chinese this is pronounced 'gai shan':

* 改善 ('gǎi shàn') means 'change for the better' or 'improve'.
* 改 ('gǎi') means 'change' or 'the action to correct'.
* 善 ('shàn') means 'good' or 'benefit'. 'Benefit' is more related to the Taoist or Buddhist philosophy, which gives the definition as the action that 'benefits' the society but not one particular individual (i.e. multilateral improvement). In other words, one cannot benefit at another's expense. The quality of benefit that is involved here should be sustained forever, in other words the 'shan' is an act that truly benefits others.

History

In Japan, after [[World War II], American occupation forces brought in American experts in statistical control methods and who were familiar with the War Department's Training Within Industry (TWI) training programs to restore the nation. TWI programs included Job Instruction (standard work) and Job Methods (process improvement). In conjunction with the Shewhart cycle taught by W. Edwards Deming, and other statistics-based methods taught by Joseph M. Juran, these became the basis of the kaizen revolution in Japan[1] that took place in the 1950s.

Implementation

The Toyota Production System is known for kaizen, where all line personnel are expected to stop their moving production line in case of any abnormality and, along with their supervisor, suggest an improvement to resolve the abnormality which may initiate a kaizen.

The cycle of kaizen activity can be defined as: standardize an operation -> measure the standardized operation (find cycle time and amount of in-process inventory) -> gauge measurements against requirements -> innovate to meet requirements and increase productivity -> standardize the new, improved operations -> continue cycle ad infinitum. This is also known as the Shewhart cycle, Deming cycle, or PDCA.

Masaaki Imai made the term famous in his book, Kaizen: The Key to Japan's Competitive Success.

Apart from business applications of the method, both Anthony Robbins and Robert Maurer have popularized the kaizen principles into personal development principles. The basis of Robbins' CANI (Constant and Never-Ending Improvement) method in kaizen is discussed in his Lessons in Mastery series.