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SIX SIGMA AND LEAN CONCEPT IN LABORATORY MEDICINE

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SIX SIGMA AND LEAN CONCEPT IN LABORATORY MEDICINE ... The four keys' of Lean Six Sigma could be defined as: Delight patients with speed and quality, ... – PowerPoint PPT presentation

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Title: SIX SIGMA AND LEAN CONCEPT IN LABORATORY MEDICINE


1
SIX SIGMA AND LEAN CONCEPT IN LABORATORY MEDICINE
  • Abdurrahman COSKUN, MD
  • Düzce University, School of Medicine, Department
    of Clinical Biochemistry
  • Düzce-TURKEY

2
Six Sigma
  • The Six Sigma was developed in the early 1980s by
    Motorola Corp. to improve the products
    reliability
  • The methodology represents an evolution in
    quality management that is being widely
    implemented in business and industry in the new
    millennium

3
The Six Sigma strategy
  • The Six Sigma strategy measures the degree to
    which any process deviates from its goal
  • The sigma value indicates how often errors are
    likely to occur the higher the sigma value, the
    less likely it is that the process will produce
    errors.

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Sigma metrics
  • Sigma metrics are being adopted as a universal
    measure of quality and the performance of all
    processes can be characterized on the "Sigma
    scale."
  • Any process can be evaluated in terms of the
    number of sigma metrics that fit acceptable
    limits.

6
  • The process Sigma level can be calculated by
    dividing the allowable tolerance for the process
    by twice the process SD
  • Sigma Total process tolerance /
    (2process
    SD).

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  • However in clinical laboratory measurements, it
    is straightforward to measure the sigma
    performance of analytical methods as formulated
    below
  • Sigma (TEa-bias)/CV
  • where TEa is the total error allowable and
  • CV is the coefficient of variation.
  • Ideally, Six Sigma, or six SD, should fit within
    the acceptable limits of a process

9
-6s -5s -4s -3s -2s -1s
0s 1s 2s 3s 4s 5s 6s
10
T
  • -6s -5s -4s -3s -2s -1s
    0s 1s 2s 3s 4s 5s 6s

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  • The best or world class processes have a
    level of 6 sigma, which means that in this
    process fewer than 3.4 errors occur per million
    products or tests (with 1.5 standard deviation
    (SD) shift)

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6.8
3.4
15
  • In clinical laboratories, Sigma is usually
    calculated for the analytical phase of testing
    process
  • However the entire medical loop of the total
    testing process, i.e. from the clinician to the
    laboratory and back to the clinician consist 5
    phases
  • Pre-pre-analytical,
  • Pre-analytical,
  • Analytical,
  • Post-analytical and
  • Post-post-analytical phases.

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19
Lean Concept
  • In patient focused quality management high level
    of quality itself is not adequate, the result of
    patients tests should be reported within the
    given time and in communication with the
    physicians.

20
  • For that reason we should combine the Lean
    concept with Six Sigma to make the work faster
    (using Lean principles) and better (using Six
    Sigma principles)
  • Traditionally the Six Sigma focused more on
    quality than the speed and the Lean focused on
    the flow speed than quality improvement

21
  • The four keys of Lean Six Sigma could be
    defined as
  • Delight patients with speed and quality,
  • Improve methods and processes,
  • Work together for maximum gain, and
  • Base decision on data and facts

22
  • Clinical laboratories, which have been used Lean
    Six Sigma in total quality management, decreased
    errors and contributed patients safety more than
    most other healthcare sectors
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