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

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Il 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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Consigli degli Esperti Registrati Approfondimenti avanzati sul Six Sigma (Inglese). Qui troverai consigli professionali di esperti. SS Implementation Principles Implementing SS Succesfully In the article 'SS - the route to business excellence' (Management Services, Winter 2005), John Morgan argues tha (...) SS Approaches / Steps Compared DMAIC, DMADOV, DMAEV, DABTL Commonly SS projects focus on re-designing processes and systems and improving performance of existing systems. W (...) Good SS Project Management SS Project Characteristics In their article 'SS in Service Organizations' (International Journal of Quality & Reliability Management, Vol. 2 (...) Hypothesis Testing in Lean SS Explained SS Hypothesis Testing How to do simple hypothesis testing in lean SS? How to simplify the basic roadmap in a hypothesis test? Using th (...) 6 Management Responsibilities in 6 Sigma SS Implementation, Best Practices The six imperative responsibilities top managers must take on in the early stages of a SS process: 1. Develop a (...) Human Sigma Improving Employee-Customer Encounters Although SS is an extremely powerful tool in manufacturing contexts, it falls short when it comes to the employee (...) SS in Service Organizations Benefits According to Jiju Antony ('SS for Service Processes', Business Process Management Journal, Vol. 12, No. 2, 2005), (...) How SS Supports TQM TQM, SS Forrest B.Green suggests in a paper called: Six-Sigma and the Revival of TQM that Total Quality Management (TQM) is unde (...) SS Lessons Learned Process Improvement of SS Projects Although SS programs typically start of well, they all too often fail to have a lasting impact as participants gr (...) SS in Service Organizations Challenges and Difficulties Although the adoption of a SS business strategy in service organizations can lead to considerable benefits, follo (...) 3 Critical Success Factors for SS Projects Getting results out of a 6 Sigma project 3 Critical Success Factors of a SS project are: 1 Executive Engagement: - Support consistently the organization (...) 3 SS Variants Differences in SS Approaches Behind the success of 3 major companies who innovatively applied SS in Supply Chain Management there are differen (...) Measurement Systems Analysis (MSA) Testing Measurement Systems, Improving Measurement Systems, Assessing Measurement Systems WHAT IS MEASUREMENT SYSTEMS ANALYSIS (MSA)? MSA is a type of experiment whereby you measure the same item or object rep (...) Generic SS Project Ideas Identifying LSS Projects Here are some general 6 Sigma project ideas: • Reduce expenses at… • Reduce scrap… • Reduce downtimes… or increase up (...) Design for SS Supply Chain & Quality In addition to the two common key methodologies: DMAIC and DMADV of SS, there is another separate approach which (...) How to Make Value Stream Map? Tips Making a Value Stream Map, Creating a Value Stream Map Hi, here's a great explaining youtube clip on tricks for making a VSM. Enjoy! (...) DMAIC Approach is Sequential, But... SS Implementation The DMAIC approach is designed to allow for flexibility and iterative work, if necessary. As more is learned through thi (...) The DMAIC Process Step by Step Example SS Implementation, DMAIC Process In order to better illustrate the DMAIC process, consider the case of a janitorial company that wants to boost the calib (...) Lean SS Programs Driving Innovation Based on an analysis of Caterpillar and other companies that used lean SS programs to drive broad-based innovatio (...) CCR and CTQ SS Method What Key Overall Requirements are there? Requirements come from the customer (VoC) and the business (VoB), depending on (...) SS Improvement Team Composition and Procedure SS SS teams should be multidisciplinary. The diversity of perspectives in the team — which includes someone with exp (...) Appropriate Sample Sizes in SS SS The first question faced by a statistical consultant, and frequently the last, is, “How many subjects (animals, units) d (...) Radical Innovations Assessing Your Level of Preparedness According to the article “Using a Lean SS Approach to Drive Innovation” by George Byrne, Dave Lubowe and Amy Blit (...) Control Charts and Control Limits Controlling the Process Elements of a Control Chart There are three main elements of a control chart 1. A control chart begins with a time ser (...)

Fonti di Informazione Registrati Varie fonti di informazioni su La Metodologia Six Sigma. Qui troverai powerpoint, video, notizie, ecc. da utilizzare nelle tue lezioni e seminari. Six Sigma Dictionary (250 terms) 6 Sigma Terms Short explanation of 250 six sigma terms. By Luis Garcia Guzman. (...) Great Truths about Six Sigma Introducing SIx Sigma Humorous introduction to Six Sigma with cartoons from various cartoonists. (...) Six Sigma Explanation Business Process Improvement Definition of “Six Sigma” Six Sigma Best Practice Implementation framework Key Ingredients for a Successful Six Sigma (...) Lean Assessment Tool Lean / Six Sigma Assessment Spreadsheet calculates current and future Lean and Six Sigma scores based on scoring in 28 criteria. Generates Lean Over (...) 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 Presentation about process management, particularly process modeling simulation and design. The presentation focuses on (...) Six Sigma Calculator Calculating DPM and PPM Determine the process performance in terms of Defects Per Million (DPM) or Parts Per Million (PPM). (...) SS Origins and Destinations Six Sigma and Sustainability Presentation by Prof. Rick Edgeman explains DMAIC, DFSS, the role of 6 Sigma in biophysical sustainability, environmenta (...) Introduction to Project Quality Management Quality Management, Project Quality Planning, Project Quality Assurance, Project Quality Control Presentation about Project Quality Management. A large part of the presentation is about Six Sigma as a quality manageme (...) Overview Six Sigma Six Sigma Method Presentation defines Six Sigma as a disciplined, data-driven approach and methodology for eliminating defects in any pro (...) 8 Wastes Assessment and 5S Analysis in Office Environments Lean, 5S , WASTE In the office environment, our work does not take place on our desks, but on our computers and in our digital networks. (...) 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 While both Six Sigma and Lean focus on waste reduction as a key aim (recognizing waste comes in many forms), this is the (...) Six Sigma Diagram Quality Assurance Download and edit this 12manage PowerPoint graphic for limited personal, educational and business use. Republishing in (...) Certifications from Various Accreditation Agencies Six Sigma Certifications The attachment gives an overview of existing Lean Six Sigma Certifications. When you want to find or become yourself a (...) Errors in Hypothesis Testing Errors in Hypothesis Testing An article with example how we can circumvent errors in Hypothesis testing. Setting the value of α is not automati (...) 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 Quality managers who understand how to apply statistical tools for Design of Experiments (DOE) are better able to suppor (...) Six Sigma Capability Studies Determining the Six Sigma Level For many years industries have used Cp, Cpk, Pp and Ppk as statistical measures of process quality capability. Some segm (...)

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