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Advantages and disadvantages of Six Sigma

In one of the previous posts we introduced the Six Sigma Methodology that is rather widely used nowadays. This post is dedicated to the advantages of this methodology and will help to explain why it’s so popular.

The first and most obvious advantage of the methodology is the rise of profitability at the expense of cost’s cutting down. Thanks to the involvement in the projects thanks to Six Sigma this abbreviation can be rather considerable. Six Sigma allows achieving complete satisfaction of clients. And still it is not all. The companies can calculate their success in a durable perspective, only if can surprise the clients with innovative sentences. Moreover, the companies should improve their activity continuously.

The special attention given in the methodology Six Sigma to the rigidity of the process, to its correspondence to the installed norms, contradicts the innovation which, essentially, is a deviation from the norm. The innovative approach means deviations in production, the redundancy, the unusual solutions, insufficient study – all with what Six Sigma fights. It is necessary to report it to the heads, who decided to introduce this methodology.

There is also one more aspect, rather essential to the heads, which is necessary to remember. Six Sigma – not simply a modification of the old technological methods of quality support; it is essentially new approach for company management. Experts are not inclined to oppose Six Sigma and ISO 9001 (here at Oxagile we work according to ISO, by the way).

The number of experts considers a method “Six Sigma” simply as one of the statistical methods of the analysis and measurement of quality that can be used as one of possible ones while implementing ISO 9001. This quality standard orders mandatory application of statistical methods on industrial deviation which is an important part of Six Sigma.

  • Feb 5th, 2009 at 3:35 pm

    Six Sigma has been masterfully applied at GE, where revenue and profits are increased not only through cost-cutting, but through accelerated growth.

    Removing variation and being able to predict results using statistical process control is central to Six Sigma.

    Remember Deming:

    The 14 points.

    1. Create constancy of purpose toward improvement of product and service, with the aim to become competitive and to stay in business, and to provide jobs.
    2. Adopt the new philosophy. We are in a new economic age. Western management must awaken to the challenge, must learn their responsibilities, and take on leadership for change.
    3. Cease dependence on inspection to achieve quality. Eliminate the need for inspection on a mass basis by building quality into the product in the first place.
    4. End the practice of awarding business on the basis of price tag. Instead, minimize total cost. Move toward a single supplier for any one item, on a long-term relationship of loyalty and trust.
    5. Improve constantly and forever the system of production and service, to improve quality and productivity, and thus constantly decrease costs.
    6. Institute training on the job.
    7. Institute leadership (see Point 12 and Ch. 8). The aim of supervision should be to help people and machines and gadgets to do a better job. Supervision of management is in need of overhaul, as well as supervision of production workers.
    8. Drive out fear, so that everyone may work effectively for the company (see Ch. 3).
    9. Break down barriers between departments. People in research, design, sales, and production must work as a team, to foresee problems of production and in use that may be encountered with the product or service.
    10. Eliminate slogans, exhortations, and targets for the work force asking for zero defects and new levels of productivity. Such exhortations only create adversarial relationships, as 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.

    * Eliminate work standards (quotas) on the factory floor. Substitute leadership.
    * Eliminate management by objective. Eliminate management by numbers, numerical goals. Substitute leadership.

    11. Remove barriers that rob the hourly worker of his right to pride of workmanship. The responsibility of supervisors must be changed from sheer numbers to quality.
    12. Remove barriers that rob people in management and in engineering of their right to pride of workmanship. This means, inter alia, abolishment of the annual or merit rating and of management by objective (see Ch. 3).
    13. Institute a vigorous program of education and self-improvement.
    14. Put everybody in the company to work to accomplish the transformation. The transformation is everybody’s job.

  • May 17th, 2017 at 1:42 pm
    Adroit Learning

    Well, Lean is a philosophy that aims at the free flow of the supply chain of the company and attacks all sorts of wastes within the company. A Lean centric company is highly responsive to the needs of the clients. As the Six Sigma, Lean provides the company with manifold benefits. In order to triumph in today’s highly competitive environment, it’s essential for the companies to practice Lean.

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