Justo a Tiempo

Centro de Conocimiento

   

Programación de la cadena logística. Descripción de la filosofía Justo a Tiempo de Taiichi Ohno. ('70)

Índice

  1. Resumen
  2. Foro
  3. Mejores Prácticas
  4. Expert Tips
  5. Recursos

Imprima

Justo a Tiempo

¿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 de Justo a Tiempo (JIT)
  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 debería revisar y pensar en mejorar la eficacia de ...
     
 
  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 incumplimiento en las demandas de producción y cons...
     
 
  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 barriers to act as a reference for those wanting t...
     
 
  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 done now during the changeover. I wanted to FILM thi...
     
 
  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 sandwiched between performance and customer r...
     
 
  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:”Kanban, in essence, becomes the autono...
     
 
  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 time);
4. Eliminate waste and non-value-added ...
     
 
  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 clas...
     
 
  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:
* Changes in product demand: the process ...
     
 
  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?...
     
 
  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 the human body will take care of our heartbeat and ...
     
 
  Why is a Sustainable Business Approach Capable of Removing So Much Inefficiency 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  
   
 
  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 purchased parts were the very last to be p...
     
 
  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 each must bring to the chain.
Managing a supp...
     
 
  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....
     
 
  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 how to prevent all the mistakes. The process has to...
     
 
  Information Velocity
Why is information velocity important in supply chain management?...
     
 
  Importance of Inventory Velocity
Why is inventory velocity so important in supply chain management?...
     
 
  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 suggestions....
     
 

Justo a Tiempo (JIT) Grupo de Interés Especial


Grupo de Interés Especial

Justo a Tiempo (JIT) Educación y Eventos


Encuentre un curso, seminario, o evento


Mejores Prácticas - Justo a Tiempo (JIT) Premium
  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 condition. So you would expect that we should not furthe...
     
 
  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 like in Toyota.
2. Deep buyer-supplier relat...
     
 

Expert Tips (ENG) - Just-in-time Premium
 

Main Advantages of JIT?

Among the main causes for the success of Just-in-time are its capabilities to deal with certain major economic trends:
a. Deal with decrea...
Usage (application): Benefits of Just-in-time
 
 
 

Lean Tools to Attack Waste

What lean tools you can use for every waste you can find at your company?
Before you try to implement these lean tools you have to train your ass...
Usage (application): Waste Management, Waste Tools Overview
 
 
 

7 Things to Avoid in Just-in-Time

The seven zeros or seven areas of wastes in JIT / Lean Thinking are:
- Zero Defects: To avoid delays due to defects
- Zero (Excess) Lot Siz...
Usage (application): Just-in-Time Pitfalls
 
 
 

Use of Andon as Part of Just-in-time

Just-in-time is a pull-system. That means that when the customer places his order, the machine starts rolling.
Of course the whole organiz...
Usage (application): Signaling Abnormalities
 
 
 

The 8 Wastes of Lean Explained

T - Transport - Moving people, products & information
I - Inventory - Storing parts, pieces, documentation ahead of requirements
M - Motion ...
Usage (application): Waste Management
 
 
 

Standard Work in Just-in-Time

A just-in-time organization has to be capable to function 100% reliable when ‘pulled’ by the customer.
To achieve this readiness the organ...
Usage (application): Just-in-Time
 
 
 

Operation Management Issues and Focus Areas

According to Heizer and Render, there are 10 decision areas of Operation Management (each having typical issues):
1. Goods and Services De...
Usage (application): Operations Management, JIT, Kaizen
 
 
 

How to Focus your Improvement Efforts?

Very often organizations consider continuous improvement as committing on improvement efforts, and thus creating projects to implement them, in all ar...
Usage (application): Achieve More With Less, Kaizen, BPR, JIT, Lean, Value Chain
 
 
 

Synonyms of Just-in-time (JIT)

Instead of JIT, you may also find the following similar terms:
- Continuous Flow Manufacturing (IBM)
- Stockless Production (HP)
- Repe...
Usage (application): Other Terms that are used to Indicate JIT
 
 
 

JIT II

The term JIT II has been applied as co-location and is a further step toward reducing unnecessary logistics times and costs and exploring further oppo...
Usage (application): JIT with supplier
 
 
 

Obtaining a High Supplier Quality

W. Edward Deming, a well-known management consultant, strongly recommended Sole (Single) Sourcing as the only management way to obtain high supplier q...
Usage (application): Best Practice to Consider
 
 

Recursos - Justo a Tiempo (JIT) Premium
 

Noticias

Jit Filosofia
     
 

Noticias

Jit Justo A Tiempo
     
 

Vídeos

Jit Filosofia
     
 

Vídeos

Jit Justo A Tiempo
     
 

Presentaciones

Jit Filosofia
     
 

Presentaciones

Jit Justo A Tiempo
     
 

Más

Jit Filosofia
     
 

Más

Jit Justo A Tiempo
     

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


Vuelva a la página principal de Administración: Cambio y Organización  |  Cadena Logística & Calidad


Más Métodos, Modelos y Teoría de la Administración

Special Interest Group Leader

Usted aquí


Acerca de 12manage | Publicidad | Vincúlese | Privacidad | Términos del Servicio
Derechos reservados 2016 12manage – El atajo para ejecutivos. V14.0 – Última actualización: 26-7-2016. Todos los nombres tm pertenecen a sus propietarios.