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Tsunami en Lean Manufacturing

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Tsunami en Lean Manufacturing

Mensaje  wsterlin el Sáb Mar 26, 2011 12:07 pm

Tsunami en Lean.

Muchos deben pensar que este titulo es raro, agresivo, y quizás hasta sin sentido. Se trata realmente de llamar la atención sobre un hecho que esta ocurriendo en este momento en muchas partes del mundo que considero como un desastre en la cadena de abastecimiento y como esta relacionado con el continente asiática y el recién tsunami de Japón, pues llame estas reflexiones tsunami en lean con la esperanza de captar la curiosidad de todos los potenciales lectores del mundo y prevenir en cierto grado la recurrencia del fenómeno en el futuro.

El fenómeno que escuche y leí en las noticias es que muchas empresas tienen problemas de disponibilidad de algunos de sus productos en el mercado, y otras condicionan los pedidos en categorías especificas porque no todas pueden ser manufacturadas en este momento, y todo esto simplemente porque tienes faltantes de materia prima de origen japonés, chino, o de Singapur, estos dos últimos  a su vez abasteciendose del primero para fabricar esta materia prima. Y es de mas decir que la causa de estos faltantes es el terremoto seguido del tsunami de marzo en Japón.

Esto es un desastre. No se trata de unas empresas. Son muchísimas. Y lo grande es que dentro de los nombres están empresas que llevan un tiempo y logros considerables en lean manufacturing, empresas modelos en x o y concepto y métodos de Lean. Esto es un desastre en Lean. Esto es que se dio un tsunami en lean y acabo con el justo a tiempo, porque alguien en la administración de estas empresas no tuvo la estrategia lean correcta, no pensó lean, sino costo. Es el caso de la industria automovilística donde hay marcas en este momento que no pueden proveer al mercado ciertos colores, o hasta ciertos modelos. También se trata de la industria textil que no puede proveer algún tipo de tela y color. Pero es aun mas grave cuando ademas incluye parte de la industria electrónica donde algunos componentes son de fabricación nipona y estas tarjetas electrónicas van en dispositivos médicos. Dios que desastre!

Queremos recordar dos reglas básicas de Lean Six Sigma que si nuestros ofensores de lean hubieron entendidas y adoptadas, pues toda esta situación se podía evitar.

Regla 1- QRM o Quick Response Manufacturing se enfoca en reducción de lead time. Reducir lead time implica ruta lechera (milk run) es decir entregas mas pequeñas y mas frecuentes. Si su planta esta a miles de millas de su suplidor no puede pretender a milk run, mucho menos a lead time pequeño de parte del. Lo lógico es que se sitúa en un radio de algunas decenas o quizás cientos de millas de su planta.  Aquí hubo mas un pensamiento en costo que en tiempo. Precisamente el anti QRM. 

Regla 2- confiabilidad de los procesos o RTY Row throughput Yield in Six sigma. Explico. Si un producto tiene entre otros, 5 componentes fabricados uno en Japón, uno en la India, otro en Méjico, uno en República Dominicana, y el ultimo en China, y que la confiabilidad de que no ocurra un fenómeno natural que afectara la entrega a tiempo desde Japón por ejemplo es de 99%, de India un 93%, de Méjico un 97%, de República Dominicana un 95% y de China un 90%, pues por regla matemática la confiabilidad final de su entrega a tiempo basado en que no pase un desastre natural es de 0.99 por 0.93 por 0.97 por 0.95 por 0. 90 lo que resulta en solo un 0.76 o 76% de entrega a tiempo (aun considerando todos con un 99% esto no le dará mas que 95% de toda forma pobre para un desempeño lean).  Pero si están todos en un mismo lugar (lo que también hace sentido con la ruta lechera) y que la probabilidad de no ocurrencia de fenómenos naturales de este lugar es tan solo 97%  pues la confiabilidad final es de 97%, hasta mas alto que todos los 99% juntos. Y da igual si pasa en este lugar no tener 5 componentes que si pasa en uno de los otros lugares y no tener un componente. El producto final no se podrá entregar.

La gente con poder de decisión en la cadena de suministro de estas empresas no siempre pensaron lean como podemos darnos cuenta ahora. Su enfoque ha sido mas en reducción de costo a través de estrategia de mano de obra, impuestos y otras, pero no en creación de flujo de valor que a menudo resulta mas eficaz y grande. Ademas una correcta aplicación de lean estratégico hubiera tomado en cuenta las amenazas del proceso de compras y de abastecimientos y hubiera generado  iniciativas lean para compensar. Deseamos que estos ofensores de lean no vayan a pensar ahora que la solución es hacer mayor inventario de su materia prima y hasta de su producto terminado. Estarían entonces violando otra regla mas de lean y de hecho toda la filosofía lean.

wsterlin

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Re: Tsunami en Lean Manufacturing

Mensaje  Carlos Cabral el Vie Abr 01, 2011 12:49 pm

Masters, Para darles una pista, podemos imaginar los suplidores en diferentes paises como un proceso en serie para medir la confiabiabilidad(TPM), entonces la confiabilidad del proceso seria el producto de la confiabiliad de cada estación, asi como en la maquina, la probabilidad de un desastre en cada pais. Si fuese una sola maquina pues la confiablidad seria mayor, entienden la razon?.


Carlos Cabral

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Re: Tsunami en Lean Manufacturing

Mensaje  wsterlin el Vie Abr 29, 2011 7:47 am

El 26 de marzo, dos semanas después del desastre en Japón escribímos los primeros comentarios sobre el efecto del desastre en la cadena de suministro y las fallas que los "anti lean" iban a encontrar en la metodología y filosofía lean. Incluimos por cierto un sondeo de las reacciones posibles a adoptar por las organizaciones.

Hoy me encontré con este tema en mi twitter siguiendo a isixsigma, que viene a respaldar todo nuestro análisis de la situación y la violación de dos reglas básicas de lean. Ver tema original arriba.

Pienso que es de interés copiar el enlace (link) para que pueden seguir enriqueciendo este tema y a la vez actualizarse sobre los acontecimientos lean relacionados con el problema de Japón.

No dejan de visitar
http://www.isixsigma.com/index.php?option=com_k2&view=item&id=4826&Itemid=1&Itemid=1

wsterlin

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Re: Tsunami en Lean Manufacturing

Mensaje  wsterlin el Vie Abr 29, 2011 2:17 pm

Después del link al artículo de Isixsigma estoy también reproduciendo abajo un newsletter de John Shook, Chairman y CEO de Lean Enterprise Institute, el cual básicamente apoya los cálculos de confiabilidad regional que hicimos en nuestro argumento inicial, y la necesidad de usar alguna planificacion estratégica de lean considerando las amenazas de un outsourcing como por ejemplo las herramientas de SLean (Strategic Lean).

Dear Walker,

Henry Ford could get the customer any type of Model T as long as it was black. But the Ford Motor Company now finds itself in the strange position of being able to supply vehicles in any color except (metallic) black as a result of the catastrophe in Japan.

The earthquake-tsunami that hit northeast Japan has rocked global supply chains that will be changed forever. Who knew (I didn't) that so much of the world's production could be so devastated by disruption from a single region? Instead of simple knee-jerk responses, let us commit to leverage these events to initiate a new and total revolution in sourcing strategy. First, a quick look at how we got here. What happened?

A trend that started in the auto industry in the 1990s and became a tsunami that has now hit the whole industrial world: a radical supply model that outsourced, offshored, and "single sourced" from a single suppler often at a single plant thought to be the cheapest location in the world. (And tooling costs were saved too by installing capacity at only one supplier location.)

Twenty years ago, Inaki Lopez at GM and then VW kicked off this revolution in automotive supply chains that quickly expanded to the whole industrial world. To be sure, a revolution was needed at that time. OEM-supplier relations in the auto industry were often too cozy and OEMs had so many suppliers they could barely identify them all. Lopez made the First Commandment of Sourcing: Lowest Global Piece Price. All previous considerations of how parts related to operations went out the window. Cozy buyer-seller relationships vanished - that's good - but sensible considerations such as total cost, quality, logistics, and partnering for mutual prosperity also disappeared.
Before long, even internal operations were held to the same pricing standards. "Outsourcing" grew along with "offshoring," under the edict, "Match the price I can get in China or your contract goes up for bid." And up for bid they did go, and out of business they went. First, smaller suppliers closed their doors, at huge cost to OEMs to replace the lost supply of parts and materials. They were followed by larger ones. Eventually all major automotive-dedicated suppliers based in the USA filed for bankruptcy.

As a result, supply chain logistics became increasingly complex. Other trends contributed: more sophisticated software and transportation systems, for example, led to the rise of "3PL" or third-party logistics specialists. Logistics and even supply chain strategy became outsourced. Outsourcing begat outsourcing. Not unlike the specter of machines designing machines (as in "the Terminator"), a monster was created. In the end, yet another key competence of manufacturers was lost to specialists whose interests were their own, not the OEM's. Not the customer’s.
There is nothing inherently wrong with sourcing globally. But a single-minded focus on lowest piece-price with no regard to broader regional strategies leads to unneeded complexities. And, as we see from the catastrophe in northeast Japan, unneeded risk. Who knew (I didn't) that 40% of the auto industry's microchips were being produced in one relatively small region, most of them in one factory.

The simplistic and predictable reaction of some critics to question just-in-time is, of course, not the real issue here - supply chain strategy and configuration are. In fact, semiconductors weren't being produced via JIT anyway - large batches still hold sway in the electronic components industry. And yet as usual, the catastrophe in Japan has given rise to cries for the end of JIT. Minimal buffer stocks caused immediate production losses so surely the answer, according to critics, is more production and more stock. Increasing buffer stocks or finished goods inventory to buffer against a 100 year interruption is absurd (See: Nonsense about JIT by Jim Womack).

A car has thousands of discrete parts and doesn't become a car until it has each and every one of them. "Tuxedo Black" is Ford's name for a color dependent on a unique pigment from a Merck plant close to the Fukushima Daiichi nuclear plant. It isn't produced anywhere else. Merck says the plant wasn't damaged but, due to radiation, engineers won't be able to even reenter the plant for weeks and once they do it will take six to eight weeks to set things back to order and begin producing Zirallic, Merck's name for the pigment. In the meantime, Ford can still build a truck for you, just not one in Tuxedo Black.

The deeper problem is that most companies didn't know the full extent of their exposure to risk. Buyers know their suppliers, but usually not their suppliers' suppliers, or the suppliers of those suppliers. Toyota has demonstrated remarkable ability to recover from supply disruptions in the past (See: Aisin factory fire in 1997). Honda too: when US tariffs disrupted their steel supply ten years ago, Honda airlifted carbon sheet steel from Japan to the U.S.

A New Model for Sourcing and Logistics – Regional and Rational
Similarly, the solution isn't just a matter of exiting northeast Japan, another knee-jerk reaction of some supply-chain companies. Rather, the solution lies in totally rethinking supply chains. In general, it makes most sense to produce close to where you sell. And in general it makes most sense to engineer close to where you produce. And it certainly makes most sense to procure as close as possible to where you produce for your customers. For most large firms, that means we need regional supply strategies.

So let's use the current crisis to signal an end to 20 years of madness in sourcing strategies. Single sourcing is dangerous. That much is obvious. And 100 sources all competing for the next contract based on piece price is also dangerous, in a different way. When that single source is continents away from production facilities, the danger is magnified.

A new sourcing model is needed. The wisdom of 'dual supplier' strategies of many lean thinking supply chain managers is clear - avoid both single source and "numerous source" situations. When Deming advocated what he called "single sourcing," he was promoting OEM-supplier relationships based on partnership, not zero-sum negotiation; and on cost of quality, not price of transaction. Toyota's traditional approach was to pursue dual sourcing for first and second tier suppliers (unfortunately this did not always extend to often small third-fourth tier suppliers - thus Toyota is especially suffering from the global supply crisis since 80% of their in-vehicle computer chips were being supplied by one facility in northeast Japan with no easy re-sourcing possible). With dual-sourcing, risk is avoided, such as when one supplier facility goes down, and competition is encouraged, with two suppliers in the game.

Anyone anywhere who wants to make their country a competitive manufacturing location needs to practice lean math. That's total cost -- including the potential cost of disruption on long-distance supply chains -- rather than the piece price plus slow freight cost calculation done by most manufacturing firms today. The USA, specifically, is already a much more "competitive" manufacturing location than most senior managers seem to think, based on the continuing decisions to send manufacturing to locations far and wide. For an example of a simple total cost model, from the Reshoring Initiative, go here: http://www.reshoringmfg.com/ .

But, be careful. Any costing model will be based on assumptions, and while risk can be included, no risk model could account for the disruption that began on March 3, 2011. Rather than a cost model that we hope will spit out the perfect answer every time, it's more practical to work from some simple principles of lean supply chain configuration. Shorter lead times are better than long. Closer proximity between suppliers and customers is better - shipping regionally better than shipping across oceans. Less inventory with more frequent delivery is better than large inventories that move infrequently. Single sourcing, especially single location sourcing, is bad - it's risky and doesn't leverage natural, healthy competition tension. Maintaining hundreds of suppliers for the same part is also bad - it generates complexity, confusion, and costs of redundancy.

Also, the challenge of adopting a total cost view is more than resistance to the basic concept. Companies are inept at understanding true total costs, let alone how to make decisions accordingly. As costs are broken down and allocated across functional lines, ownership and even understanding become murky. That's where the lean math comes in. Matt Lovejoy is CEO of Acme Alliance, a casting machining company outside of Chicago. Acme has operations that produce the same goods in Illinois, Brazil, and China, so Acme knows the actual cost - not price but cost - of producing in each country. Buyers often approach Matt and Acme in Chicago with an edict to source products in China, for example, when it makes more sense - in every way - to produce closer to the OEM, closer to the customer.

Matt has found that many Lopez-ized buyers who want to shift sourcing from Illinois to China fail to consider a plentitude of costs and consequences (consider and considerations are very close in the sentence). Metal can cost more (surprise) in China than the USA (see Shanghai Metal Index versus London Metal Exchange). Energy costs more in China than the USA. Same with high-quality equipment, which may be more costly in China than the USA (due to high import duties for European or Japanese machinery). And, since labor comprises a tiny portion of the cost of making most casting products, these items alone are worth careful scrutiny. And then what about the time and cost of managers' time to visit global locations, along with the communication challenges of late night conference calls with difficulty understanding those on the other end of the phone? And here's a key point to consider: What reductions in total cost could be realized if the time, effort, and energy of sourcing across the planet were actually invested in the local supplier through kaizen?

The point here, to repeat for emphasis, is NOT that sourcing in China or Brazil is a bad idea. The emergence of China and Brazil as productive sources for the global production community is a positive phenomenon of historical importance. But, each sourcing decision needs to be made on its own merits.

Stop the Madness
Lean thinking brings things together, emphasizing the connectedness of all parts, organizationally and physically: suppliers that are close to OEM factories that are close to customers. It will be no easy task to unravel the unneeded complexity caused by 20 years of piece price optimization. We can start making progress in that task by going back to the basics of starting with the customer, defining value, and working backwards from there. Working together, we can create supply chains that flow value from raw material to customer with ever shortening lead times, profiting both OEMs and suppliers.

Just as JIT is not the practice to challenge here, neither is the practice of sourcing globally. And the problem is far greater than being unable to order your vehicle in Tuxedo Black. "You need a crisis," we like to say, to spark your transformation. Global supply chain managers should be happy - they have a crisis of epic proportions. The catastrophe in northeast Japan is tragic enough in its own right and needn't have been made more so by things within our control: convoluted, high-risk, high total-cost supply chains generated by the lunacy of a narrow focus on lowest global piece price. Now is the time to rethink and reconfigure supply chains so they are rational, regional, practical, low in total cost and risk and high in fostering quality - in short, lean supply chains.

John Shook
Chairman and CEO
Lean Enterprise Institute, Inc.

wsterlin

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Re: Tsunami en Lean Manufacturing

Mensaje  Contenido patrocinado Hoy a las 5:22 pm


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