Justo a Tiempo

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¿qué es el Justo a Tiempo (JIT)? Definición

El Just-in-time (Justo a Tiempo) fue iniciado por Taiichi Ohno en Japón en las plantas de ensambleje de Toyota a principios de los años 70. Es una filosofía de organización industrial.   El JIT elimina el desperdicio proveyendo repuestos sólo cuando el proceso de ensamblaje lo requiere. En el corazón del JIT descansa el kanban, la palabra japonesa que significa tarjeta. Esta tarjeta kanban se envía al almacén para solicitar una cantidad estándar de piezas a medida que ellas van a ser utilizadas en el ensamblaje/ proceso industrial. El JIT requiere la precisión, pues las piezas correctas deben llegar “Justo a Tiempo” la posición correcta (estación de trabajo en la planta de fabricación). Se utiliza sobre todo para procesos industriales repetitivos de grandes cantidades de producción.

Historia del Justo a Tiempo

Históricamente, la filosofía del JIT se presentó debido a dos motivos:

1. Deseo de Japón para mejorar su calidad de la producción. En aquel momento, las compañías japonesas tenían una mala reputación de calidad industrial y de la industria automovilistica en particular.
2. Kaizen, también un método japonés de mejoramiento contínuo.

El marco del Justo a Tiempo ve en los inventarios como una pobre excusa para un mal planeamiento, inflexibilidad, maquinaria incorrecta, problemas de la calidad, etc. La meta del JIT es acelerar la respuesta al cliente mientras que se disminuyen los inventarios al mismo tiempo. Los Inventarios ayudan a responder rápidamente a las demandas cambiantes de los cliente, pero inevitablemente cuestan dinero y aumentan el capital de trabajo necesario.

En 1990, James Womack escribió un libro llamado “La Máquina que cambió al Mundo”, introduciendo la terminología “Lean Manufacturing (Producción exacta)”. También usted puede encontrar el término: “Producción sencilla”.

Áreas de atención del Just-in-time (Justo a Tiempo)

Las áreas típicas de atención al momento de poner en práctica el JIT, incluyen:

• Reducción del Inventario.
• Mas pequeños de lotes y turnos de producción.
• Control de calidad.
• Reducción de la complejidad y transparencia.
• Estructura de organización más plana y delegación.
• Minimización del desperdicio.

Just-in-time (Justo a Tiempo) Externo extendido

Con la llegada del Internet y el software de Programación de la cadena logística, las compañías han ampliado mientras tanto, el JIT fuera de las fronteras de la compañía. Exigiendo de sus proveedores entregar inventario a la fábrica solamente cuando ha necesitado para la asamblea, haciendo industrial del JIT, ordenando y los procesos de la entrega incluso más rápidos, más flexibles y más eficientes. De esta manera, se están formando Redes Integradas de Abastecimiento (redes de demanda) o Cadenas Logísticas electrónicas.

Foro Discusiones en el Foro sobre Justo a Tiempo (JIT). A continuación puede hacer una pregunta sobre este tema, compartir sus experiencias, informar un nuevo desarrollo o explicar algo. Iniciar un tema nuevo sobre Justo a Tiempo (JIT) Comparta sus conocimientos aquí (o haga una pregunta)   Inconvenientes del Justo a Tiempo Antes de aplicar el método, se tiene que tener una adecuada planeación en cuanto a los niveles de inventarios futuros deseados, ya que el no contar con inventarios suficientes, se podría traducir en i... 9   3 comentarios 🔥 NUEVO Yamazumi Gráfico Este gráfico es para realizar balanceo de líneas en Lean Manufacturing. Es indispensable y muy necesario.... 2   1 comentarios Acciones complementarias del Justo a Tiempo La implementación del sistema JIT, implica tomar en cuenta el sistema de comunicación que posee la organización, fundamentalmente la externa hacia adelante y hacia atrás (clientes y proveedores); se d... 1   2 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios Kanban and Procurement Planning Does the Kanban or the pull system contradict with the procurement planning early in the project life cycle?... 5   2 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios Information Velocity Why is information velocity important in supply chain management?... 3   2 comentarios 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 comentarios 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 comentarios 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 comentarios

Mejores Prácticas Los temas mejor valorados sobre Justo a Tiempo (JIT). Aquí encontrará las ideas más valiosas y sugerencias prácticas. 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 comentarios 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 comentarios 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 comentarios 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 comentarios 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 comentarios Lean and JIT Manufacturing Is there any difference between Lean and JIT Production?... 6   7 comentarios

Consejos de Expertos Conocimientos avanzados sobre Just-in-time (Inglés). Aquí encontrará consejos profesionales de expertos. 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...

Fuentes de Información Varias fuentes de información sobre Justo a Tiempo (JIT). Aquí encontrará powerpoints, videos, noticias, etc. para usar en sus propias conferencias y talleres. 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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Compare con: Kaizen  |  Ciclo de Deming  |  Gerencia Científica  |  Six Sigma  |  Cadena de Valor  |  Mapa de Flujo de Valor  |  CPFR  |  Gestión de Negocios Tradicionales vs Negocios Virtuales  |  Modelo Delta  |  Proveedor Logístico Externo (3PL)  |  Tecnología RFID

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