La Metodologia Six Sigma | Il Processo di Six Sigma | Il Modello di Six Sigma

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Che cosa è il Six Sigma? Descrizione

Il Six Sigma è una metodologia di quality management che fornisce ai business strumenti per migliorare la capacità dei loro processi di business. L'aumento delle performance e la diminuzione della variazione dei processi hanno condotto ad una riduzione dei difetti e ad un miglioramento dei profitti, del morale degli impiegati e della qualità del prodotto. È una misura della qualità e un programma di miglioramento a cui ha aperto la strada Mikel Harry e Motorola. Si basa  sul controllo di un processo fino al punto dei six sigma (scarti quadratici medi) da una linea centrale, o su 3.4 difetti per un milione di articoli. Include l'identificazione di fattori critici per la qualità, determinati dal cliente. Riduce la variazione dei processi e le capacità di miglioramento, aumenta la stabilità ed i sistemi di design per supportare l'obiettivo dei six sigma.



Six Sigma 6 ΣIl modello di Six Sigma è un metodo altamente disciplinato che può aiutare le aziende a focalizzarsi sullo sviluppo e sulla fornitura di prodotti e servizi quasi perfetti. È basato sul lavoro statistico di Joseph Juran, un pioniere statunitense del quality management originario della Romania. La parola “Sigma„ è un lettera greca usata per un termine statistico che misura quanto un dato processo devia dalla perfezione (scarto quadratico medio). Se il numero dei sigma è più alto, si è più vicini alla perfezione. Un sigma non è molto buono; sei sigma definiscono soltanto 3.4 difetti su un milione. L'idea di fondo del Six Sigma è che, se potete misurare i vostri “difetti„ presenti nel processo, potete calcolare sistematicamente come eliminarli. Così potete quasi “azzerare i difetti„.

L'origine giapponese del Six Sigma può ancora essere vista dal sistema delle “Cinture„ che utilizza. Se siete novizi del Six Sigma ed andate ad un corso di formazione base, otterrete una cintura verde. Chiunque abbia la responsabilità di condurre un team di Six Sigma è denominato cintura nera. Infine c'è uno speciale gruppo d'elite denominato Master Black Belts [Maestri delle Cinture Nere] che ha la funzione di sorvegliare le Cinture Nere.


Cinque fasi del Six Sigma. Processo

Tipicamente, un processo di Six Sigma ha le seguenti cinque fasi:

  1. Definizione. La prima fase di qualsiasi progetto di Six Sigma è quella di chiarire il problema e limitare lo scopo in modo tale da realizzare obiettivi misurabili nel giro di alcuni mesi. Dopodichè, si assembla un team per esaminare dettagliatamente il processo, per suggerire miglioramenti e per implementare questi suggerimenti. Nel mondo della produzione, i manager di progetto ed i loro garanti cominciano tipicamente definendo cosa costituisce un difetto per poi stabilire un insieme di obiettivi destinati a ridurre l'occorrenza di tali difetti.
  2. Misurazione. Alla seconda fase di un progetto di Six Sigma, il team riunisce i dati e li prepara per un'analisi di alto livello.
  3. Analisi. Una volta che si è tracciato e documentato un processo ed è stata verificata la qualità dei dati di supporto, il team di Six Sigma può cominciare l'analisi. I membri del team cominciano solitamente dall'identificazione dei modi in cui la gente non riesce ad agire come è necessario, o dei modi in cui la gente non riesce ad assicurare un controllo efficace in ogni fase.
  4. Miglioramento. Suggerire, decidere e implementare i miglioramenti.
  5. Controllo. Nella fase finale di un progetto di Six Sigma, il team crea i controlli. Questi permettono all'azienda di sostenere ed estendere i miglioramenti.

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Differentiating Six Sigma from TQM
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Six Sigma is a Story!
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Best Practices Lean Six Sigma in Social Care
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Quality Lessons in Dealing with Contractors
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8
 
1 commenti
Six Sigma Manufacturing Example
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8
 
1 commenti
Six Sigma Dictionary - Six Sigma Terms
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6 Sigma in Construction Industry
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Six Sigma in Textile / Confection Industry
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6 Sigma....Frame period
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1 commenti
Six Sigma Implementation Process
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The 7 Key Principles of Six Sigma
In brief, Six Sigma is a methodology that ensures quality processes are followed every time to reduce variations.
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Sustaining Momentum of Process Improvement over Time
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2 commenti
Six Sigma In Inbound Call Center
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5 commenti
Disadvantages of Lean Six Sigma. Drawbacks
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3
 
1 commenti
Should Six Sigma start after Lean Implementation?
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3
 
1 commenti
Organizational Development + Six Sigma or Lean
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3
 
4 commenti
Good Practitioner Books on Lean - Six Sigma, S&OP?
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3
 
1 commenti
Quality Critical Factors
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2
 
Lean 6 Sigma in Laboratories
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2
 
1 commenti
Lean Management in Retail
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Six Sigma Approach Part I
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Six Sigma Black Belt Certification
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5 commenti
Six Sigma Department
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1
 
1 commenti
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1 commenti
Applying Six Sigma to Landscape Architecture
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1 commenti

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3 Additional Six Sigma Levels
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Six Sigma Organization Structure
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Is Six Sigma Enough? (To Improve the Quality Level of an Organization...)
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Six Sigma DMAIC and DMADV
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Evaluating Six Sigma Projects
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Six Sigma Requirements
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Hypothesis Testing in DMAIC Projects
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Six Sigma in Medical Transcription
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4 commenti

Six Sigma Implementation Roles
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Six Sigma for Retail
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The Cost of Poor Quality: Tools for Effective Control & Reduction
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Six Sigma Effectiveness
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Six Sigma in Passengers Handling
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SS Implementation Principles

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SS Approaches / Steps Compared

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Good SS Project Management

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Hypothesis Testing in Lean SS Explained

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6 Management Responsibilities in 6 Sigma

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Human Sigma

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SS in Service Organizations

Benefits
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How SS Supports TQM

TQM, SS
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SS Lessons Learned

Process Improvement of SS Projects
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SS in Service Organizations

Challenges and Difficulties
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3 Critical Success Factors for SS Projects

Getting results out of a 6 Sigma project
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3 SS Variants

Differences in SS Approaches
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Measurement Systems Analysis (MSA)

Testing Measurement Systems, Improving Measurement Systems, Assessing Measurement Systems
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Generic SS Project Ideas

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Design for SS

Supply Chain & Quality
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How to Make Value Stream Map? Tips

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DMAIC Approach is Sequential, But...

SS Implementation
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The DMAIC Process Step by Step Example

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Lean SS Programs

Driving Innovation
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CCR and CTQ

SS Method
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SS Improvement Team Composition and Procedure

SS
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Appropriate Sample Sizes in SS

SS
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Radical Innovations

Assessing Your Level of Preparedness
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Control Charts and Control Limits

Controlling the Process
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Six Sigma Dictionary (250 terms)

6 Sigma Terms
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Great Truths about Six Sigma

Introducing SIx Sigma
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Six Sigma Explanation

Business Process Improvement
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Lean Assessment Tool

Lean / Six Sigma Assessment
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Six Sigma Intro

Introduction to SS
Introduction presentation by lakhanpalv. (...)

Business Process Management and Improvement: Six Sigma, BPR and (R)Evolutionary Change

Process Management, process Improvement, Business Process Reengineering, BPR, Six Sigma
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Six Sigma Calculator

Calculating DPM and PPM
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SS Origins and Destinations

Six Sigma and Sustainability
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Introduction to Project Quality Management

Quality Management, Project Quality Planning, Project Quality Assurance, Project Quality Control
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Overview Six Sigma

Six Sigma Method
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8 Wastes Assessment and 5S Analysis in Office Environments

Lean, 5S , WASTE
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Using the Whys Method

Six Sigma, Toyoda, Toyota, Lean Production, Root Cause Analysis
To solve a problem effectively, you need to drill down through the symptoms to the underlying cause. Sakichi Toyoda, one (...)

Six Sigma Demystified

Powerpoint
MEASURE – SIX SIGMA IMPROVEMENT METHODOLOGY A. Ask each Customer: What do you need from the service / product we provi (...)

Plan for Every Part

Lean Production, Parts Management, Value Stream Mapping, Continuous-flow Manufacturing
Business Managers are making progress in realising flow as more they learn about VSM (Value Stream Mapping) and continuo (...)

Battle of Champions in Performance Improvement: Six Sigma versus Lean

Performance Improvement Lean Six Sigma
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Six Sigma Diagram

Quality Assurance
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Certifications from Various Accreditation Agencies

Six Sigma Certifications
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Errors in Hypothesis Testing

Errors in Hypothesis Testing
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A Guide to Control Charts

Applying Control Charts, Types of Control Charts
Control charts have two general uses in an improvement project. The most common application is as a tool to monitor proc (...)

Rolled Throughput Yield

Calculating Yield of a Process
Rolled Throughput Yield allows us to expose the "hidden factory" by providing visibility into the yield of each process (...)

Sample Size Calculation

Calculating Sample Size, Determining Sample Size
The first question faced by a statistical consultant, and frequently the last, is: “How many subjects (animals, units) d (...)

Design of Experiments (DOE)

Designing Experiments, Designing Statistical Experiments
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Six Sigma Capability Studies

Determining the Six Sigma Level
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