Filosofia del Just-in-time | Filosofia del JIT

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Che cosa è Just-in-Time? Definizione

Il just-in-time è stato inventato da Taiichi Ohno in Giappone negli impianti di assemblaggio di automobili Toyota agli inizi degli anni 70. È una filosofia per le organizzazione di produzione.   Il JIT diminuisce lo spreco fornendo le parti soltanto quando il processo di assemblaggio le richiede. Nel cuore del JIT si trova il kanban, la parola giapponese per scheda. Questa scheda kanban è trasmessa al magazzino per chiedere una quantità standard di parti man mano che sono stati usate nel processo di assemblaggio/produzione. Il JIT richiede precisione, poichè le giuste parti devono arrivare “just-in-time„ alla giusta posizione (posto di lavoro della catena di montaggio). È usato soprattutto per grandi processi di produzione ripetitivi. 

Storia del Just-in-Time

Storicamente, la filosofia del JIT è scaturita da altre due cose:

1. Il desiderio del Giappone di migliorare la propria qualità di produzione. A quel tempo, le aziende giapponesi avevano una cattiva reputazione per quanto riguarda la qualità della produzione, in particolare nel settore delle automobili.
2. Kaizen, un metodo giapponese di miglioramento continuo.

Il Just-in-time considera i magazzini come una scarsa giustificazione della cattiva progettazione, dell'inflessibilità, dei macchinari sbagliati, dei problemi di qualità, ecc. Il target del JIT è accelerare la risposta del cliente minimizzando allo stesso tempo l'inventario. Gli Inventari contribuiscono a rispondere rapidamente ai cambiamenti di domanda del cliente, ma inevitabilmente costano soldi e aumentano il capitale circolante necessario.

Nel 1990 James Womack ha scritto un libro chiamato “La Macchina Che Ha Cambiato Il Mondo„, introducendo la terminologia “Lean Manufacturing [Manifuttura Snella]„. E possibile anche incontrare la parola: “Produzione Snella„. I principii dietro questi metodi non differiscono sostanzialmente dalle tecniche sviluppate da Ohno alla Toyota.

Aree di attenzione del Just-in-Time

Le aree tipiche di attenzione delle implementazioni di JIT includono:

• Riduzione dell'Inventario.
• Lotti di produzione più piccoli.
• Controllo di qualità.
• Riduzione della complessità e trasparenza.
• Struttura organizzativa orizzontale e delegazione.
• Minimizzazione degli sprechi.

Just-in-Time esteso esterno

Con l'arrivo di Internet e dei software di Progettazione della Supply Chain, le aziende hanno esteso la produzione Just-in-time fino al di  fuori delle frontiere aziendali. Richiedendo ai loro fornitori di portare il magazzino in fabbrica soltanto quando è neccessario per l'assemblaggio, rendendo la produzione JIT, l'ordine ed i processi di consegna ancora più veloci, più flessibili e più efficienti. In questo modo si sono formate le Reti Integrate di Fornitura [Integrated Supply Networks]  (Reti di Domanda) o le Supply Chain Elettroniche.

Forum Discussioni nei forum sul Filosofia del Just-in-time | Filosofia del JIT. Di seguito puoi porre una domanda su questo argomento, condividere le tue esperienze, segnalare un nuovo sviluppo o spiegare qualcosa. Inizia un nuovo argomento sul Filosofia del Just-in-time | Filosofia del JIT Condividi le tue conoscenze qui (o fai una domanda)   Single Minute Exchange of Dies Dear reader, I am currently working on a Single Minute Exchange of Dies (SMED) project in a beer production facility. To implement SMED, I need to determine the baseline on which processes are do... 14   6 commenti Combining JIT and Outsourcing JIT and outsourcing go hand in hand. On one side it seems contradictory. JIT stands for producing and delivering to the customer what he wants when he wants. This is an extreme challenging condit... 13   2 commenti How to Reduce the Vendor Risks with Just-in-Time ? When we execute JIT, we normally require our vendor to prepare some stock to deliver fast. If there are design change requests, or other products updates, how to reduce vendor stock risk?... 9   1 commenti Can Just-in-Time Work Without Kanban? Just-in-Time is a basic philosophy or a paradigm. If you read about it, you still have no idea HOW to do it. Kanban however gives a practical way to achieve Just-in-Time. As Taiichi Ohno says... 8   Importance of Inventory Velocity Why is inventory velocity so important in supply chain management?... 6   2 commenti Experiences with Including Purchased Parts in Kanban Taiichi Ohno was plant manager of a Toyota factory when he started experimenting with JIT, Kanban and other Lean tools. This is one of his stories: ‘ … we used Kanban in select areas only and the... 6   1 commenti Sustainable Business Approach after Years of JIT I had a very interesting conversation with someone who has become recently Chief Sustainability Officer of a top 10 pharma company (after years as global head of engineering there). He is using a... 5   2 commenti Just-in-time Needs Flexibility Of course, Just-in-time needs a flexible manufacturing system. But actually, this flexibility has several aspects. For a proper functioning JIT-system, flexibility is required towards: * Cha... 5   1 commenti Classification of Lean Tools Can you briefly explain how to classify lean tools? I mean: different people seem to classify Lean tools in different ways, for example according to the 8 wastes. Who can give me another way to c... 5   1 commenti Kanban and Procurement Planning Does the Kanban or the pull system contradict with the procurement planning early in the project life cycle?... 5   2 commenti The Impact of JIT on the Organization of Production Planning JIT will have a strong impact on your organization of production planning. With JIT, a factory should operate in a company similar as the autonomic nervous system in the human body. For example t... 5   1 commenti List of Barriers to Just-in-Time | Barriers to JIT Though JIT as a theoretical concept seems superb, there are practical barriers in getting this concept to work in reality and get JIT implemented properly. Let's create a complete a list of all those ... 4   4 commenti JIT in Variable Marketplaces In trying to implement a JIT system within my organisation. We are finding difficulties due to the random flows we are seeing. This random flow of products is making it hard to establish optimal stock... 4   5 commenti Customer Support in Just in Time is Needed I think for implementing Just-In-Time, the customer must support it with firm and better forecasting, co-operative and committed for inwarding supplies as per the issued schedules. Else we will get sa... 3   1 commenti Information Velocity Why is information velocity important in supply chain management?... 3   2 commenti Poka Yoke - Explanation Poka Yoke is a method that shapes the production process the way it gets almost impossible to make mistakes. Employees have to make improvements in the process and needs to come up with proposals on h... 3   1 commenti Disadvantages of JIT A lean system has no resilience. Integrating JIT as far as possible back up the supply line creates rigid connections between manufacturing units, leaving the entire system vulnerable to exogenous fa... 2   14 commenti JIT is Playground for Big Companies I think that JIT or zero inventory or any system aiming similar targets needs power to execute. There are three cushions against delivery time variability. 1. Stock 2. Extra capacity 3.... 0   4 commenti Intent of Just in Time In my view, ultimately the intent of just in time is to minimise cost. Which must be understood very well and planning should be done accordingly. For example if a process takes changeover time of 4 h... -1   4 commenti

Migliori Pratiche Gli argomenti migliori e più votati su Filosofia del Just-in-time | Filosofia del JIT. Qui troverai le idee più preziose e suggerimenti pratici. Definition of Just-in-time JIT can be considered as: 1. A way of life 2. A philosophy of continuous improvement 3. A way to achieve manufacturing excellence by continually eliminating waste.... 20   3 commenti Assumptions of Just-in-time (JIT) Assumptions for effective JIT: 1. It depends on the type of product a company is manufacturing. JIT works best in food (perishable) business, fashion but can also be applied in cars manufacturing... 16   6 commenti The Principles of Lean Lean works on certain principles: 1. Identify customer specific value (customer requirements); 2. Value stream mapping for the process (identify process); 3. Create flow (reduce cycle t... 11   4 commenti Lean Manufacturing Tools for Beginners Could somebody tell me what are the most important lean tools and techniques that should be used in a company that are about to implement lean manufacturing for the first time? Why? Thank you for your... 8   10 commenti Just-in-time: Problematic or Possible? Just-in-time (JIT) has always been a troublesome part of the management of any supply chain. However, it is feasible if the parties have a better understanding of their respective roles and the value ... 7   5 commenti Lean and JIT Manufacturing Is there any difference between Lean and JIT Production?... 6   7 commenti

Consigli degli Esperti Approfondimenti avanzati sul Just-in-time (Inglese). Qui troverai consigli professionali di esperti. Main Advantages of JIT? Benefits of Just-in-time Among the main causes for the success of Just-in-time are its capabilities to deal with certain major economic trends: ... Lean Tools to Attack Waste Waste Management, Waste Tools Overview What lean tools you can use for every waste you can find at your company? Before you try to implement these lean tools ... 7 Things to Avoid in Just-in-Time Just-in-Time Pitfalls The seven zeros or seven areas of wastes in JIT / Lean Thinking are: - Zero Defects: To avoid delays due to defects -... Use of Andon as Part of Just-in-time Signaling Abnormalities Just-in-time is a pull-system. That means that when the customer places his order, the machine starts rolling. Of cours... The 8 Wastes of Lean Explained Waste Management T - Transport - Moving people, products & information I - Inventory - Storing parts, pieces, documentation ahead of req... Standard Work in Just-in-Time Just-in-Time A just-in-time organization has to be capable to function 100% reliable when ‘pulled’ by the customer. To achieve this ... Operation Management Issues and Focus Areas Operations Management, JIT, Kaizen According to Heizer and Render, there are 10 decision areas of Operation Management (each having typical issues): 1. Go... How to Focus your Improvement Efforts? Achieve More With Less, Kaizen, BPR, JIT, Lean, Value Chain Very often organizations consider continuous improvement as committing on improvement efforts, and thus creating project... Synonyms of Just-in-time (JIT) Other Terms that are used to Indicate JIT Instead of JIT, you may also find the following similar terms: - Continuous Flow Manufacturing (IBM) - Stockless Produ... JIT II JIT with supplier The term JIT II has been applied as co-location and is a further step toward reducing unnecessary logistics times and co... Obtaining a High Supplier Quality Best Practice to Consider W. Edward Deming, a well-known management consultant, strongly recommended Sole (Single) Sourcing as the only management...

Fonti di Informazione Varie fonti di informazioni su Filosofia del Just-in-time | Filosofia del JIT. Qui troverai powerpoint, video, notizie, ecc. da utilizzare nelle tue lezioni e seminari. Summary of Lean Manufacturing and Maintenance. History, Tools, PROs and CONs Operational Excellence, Maximizing Efficiency Detailed presentation about Lean Production, including the interesting origins of Lean Production in Toyota Motor Compan... The Role of Value Chain Functions, Quality Management and Innovation in Competitive Advantage Value Chain Management, Quality Management, Innovation, Operational Excellence This presentation firstly presents the role of functional strategies and the value chain in the achievement of competiti... Financial Consequences from Implementing Lean Manufacturing JIT, TQM In the last 30 years, many U.S. firms have adopted lean manufacturing strategies. Despite evidence of substantial variat... Lean Production for a Green Environment Lean Production, Lean Manufcaturing Presentation about lean manufacturing and its relation with sustainable business. The presentation includes the followin... 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... Managing your Inventory: Quick Introduction to Just in Time, Stock Review and ABC Analysis Basic Understanding of 3Inventory Management Techniques This video gives a brief introduction to three popular Inventory Management Techniques: 1. JIT (Just in Time): Involve...

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