Lean Bim Construction

El blog lean de la construcción

La construcción no es ineficiente

Hay estudios y artículos famosos de la ineficiencia del sector y suelen mostrar gráficas de este estilo.

captura-de-pantalla-2016-12-02-a-las-18-54-25

Otros ejemplos pueden ser el informe Egan, el siguiente estudio realizado en el 20o4 por  Teicholz, de entidades privadas como McKinsey y este último más reciente de un análisis de cinco proyectos en Brasil.

Exponen entre otras razones que la productividad en otras industrias ha aumentado a ratios del 400% en el último siglo; en cambio, el mismo ratio es negativo o plano en nuestro sector. Y que una de las  razones de ese avance es la industrialización y la confianza de las empresas en cinco factores: gestión de la mano de obra, del trabajo, principios lean, simulación y relaciones causa-efecto en la fuente.

Conclusión: ni han entendido el lean ni han entendido el sector ni el origen de esa improductividad que dicen. No han utilizado por ejemplo los “cinco porqués”. La llamada construcción industrializada no se ha impuesto por una sencilla razón: aún es más cara que el enfoque tradicional. Por eso siguen haciéndose obras in situ o con elementos prefabricados. Y seguirá siendo más cara hasta que no se estandaricen procesos y elementos.

Además si hablamos de gestión económica, pocos negocios están tan bien simulados económicamente como una obra si el jefe de obra es profesional y responsable.

Y sirva de ejemplo el post anterior para ver que la construcción si está evolucionando.

Ya saben que soy un defensor del sector de la construcción español. Si queremos les damos mil vueltas a ingleses y americanos. Y además hacemos grandes megaproyectos con sueldos bajos. Y trabajando largas jornadas de trabajo. ¿Qué más puede pedir el sector? Pero también hay las estadísticas y la constatación real que largas horas de trabajo no significa ser eficiente.

A los ingenieros superiores españoles no nos han regalado 8 años de esfuerzo, exámenes maratonianos y de una gran dificultad: Estructuras, Algebra, Geometría descriptiva, etc… sirven para algo.

Yo participé hace años en un pequeño proyecto que el suministro era Just in Time. Era por ventanas horarias y entregas nocturnas diarias. Y necesitábamos un almacén satélite cercano a la obra. Era elementos prefabricados. Y nadie sabía la definición de JIT. Y ejemplos como éste hay muchos.

Los profesionales del sector español que trabajan en países de cultura anglosajona saben que la cantidad económica destinada a indirectos es mayor que aquí. Es decir, se emplea más gente para hacer lo mismo. Esto en definitiva es un despilfarro. Muchas veces en estos congresos donde se invita a gurús extranjeros he tenido que morderme la lengua. Como si lo que se aplica allí funcionaría aquí. Grave error.

Aunque debería hacerse un estudio de eficiencia por países con ratios de producción/horas o similares y eso es casi imposible. No hay datos fidedignos.

La única diferencia a favor del sector extranjero es que están más acostumbrados a gestiones con constructora participando en diseño. En cambio aquí la gran mayoría de gestiones son DBB (Design-Bid-Build). Y esto si que es un gran despilfarro conceptual.

Y todo el movimiento vinculado al Lean Construction. ¿En Japón se aplica? NO. Evidentemente son conocedores del Toyota Production System, pero dicen que eso no se aplica a la construcción. Y tienen parte de razón. Sobretodo a nivel herramientas. No tanto a nivel principios y filosofía. Y dudo mucho que la construcción japonesa sea ineficiente.

¿Entonces tiene sentido que las propiedades pidan Lean Construction? Hay que especificar muy bien que entienden por ello y cuáles son sus requerimientos. Si sólo están interesadas en planificación colaborativa, sólo tienen que pedir Last Planner System. Y esto es incluir tres palabras en los pliegos de licitación.

Sucede lo mismo con el BIM. ¿Trabajar con modelos virtuales 3D es BIM? Vemos que dice la definición de BIM según el Comité nacional Americano Bim (Us National Building Information Model Standard Project Comitte):

“Building Information Modeling (BIM) is a digital representation of physical and functional characteristics of a facility. A BIM is a shared knowledge resource for information about a facility forming a reliable basis for decisions during its life-cycle; defined as existing from earliest conception to demolition”

Detrás de este post hay un sentimiento personal de autoestima y respeto por la profesionalidad y capacitación de muchos profesionales del sector. Incluyendo también titulaciones medias como ingenieros técnicos cuya formación y dificultad es similar. Y por supuesto arquitectos (incluídos cuando me refería a ingenieros superiores). No hago discriminación en los titulados en España del sector. Estamos todos dentro incluídos.

Para conseguir verdadera autoestima debemos concentrarnos en nuestros éxitos y olvidar los fracasos y aspectos negativos de nuestra vida.  Denis Waitley

Previous

Construction 4.0

Next

Concurso LBP

50 Comments

  1. Marc

    HOla,

    Un post de un blog de hace un par de años que guarda una cierta similitud sobre la construcción industrializada:

    https://prefabricar.org/2014/09/28/implantacion-del-ipd-bim-y-prefabricacion-i/

    Casualidades o no.

  2. Information nicely applied!!
    canadian pharmacies-247
    london drugs canada
    best canadian prescription prices
    canadian drugs
    canadian rx – http://canadianpharmacyntv.com/

    canadianpharmacyusa24h Pam a90faf8

    Your comment is awaiting moderation.
  3. Good information. Thanks a lot!
    pharmacy online store
    canadian pharmacies
    trust pharmacy canada
    canadian pharmacy king
    prescription drugs online without – http://canadianpharmacyntv.com/

    buy prescription drugs without doctor Pl 9fa90fa

    Your comment is awaiting moderation.
  4. Nicely put. Thank you.
    canada pharmacy online reviews
    canada pharmacy online
    online discount pharmacy
    pharmacy northwest canada
    drug price – https://canadianpharmaciescubarx.com/

    no prescription online pharmacy Dymn 0c23668

    Your comment is awaiting moderation.
  5. Incredible a good deal of excellent material!
    canadian pharmacies
    canada pharmaceuticals online
    get prescription online
    ed meds online without doctor prescription
    canada pharmacy online no script – https://www.canadianonlinepharmacytrust.com/

    online pharmacies no prescription nug f48aa9f

    Your comment is awaiting moderation.
  6. Truly quite a lot of amazing material.
    canadian pharmacies online
    canada pharmaceuticals online
    most reliable canadian pharmacies
    canadianpharmacy
    best 10 online canadian pharmacies – https://www.canadianonlinepharmacytrust.com/

    canadian pharcharmy online fda approved Tren b1dc32e

    Your comment is awaiting moderation.
  7. Nicely put. Appreciate it!
    drug prices comparison
    canada rx
    canadadrugsonline
    canadian pharmaceuticals online
    online prescription drugs – http://canadianpharmaceuticalsonlinerx.com/

    trusted overseas pharmacies Ml ef48aa9

    Your comment is awaiting moderation.
  8. You reported that terrifically!
    mexican pharmacies shipping to usa
    cialis canada
    pharmacie canadienne
    canadian pharmacies online
    pharmacy drug store – https://canadianpharmaciescubarx.com/

    medication costs Kr 32e60b0

    Your comment is awaiting moderation.
  9. Fine advice. Many thanks.
    cialis from canada
    canadian drug store
    drugstore online shopping
    canada pharmaceuticals online
    buy drugs online – http://canadianpharmaceuticalsonlinerx.com/

    canadapharmacy hon 2_fcef8

    Your comment is awaiting moderation.
  10. Thanks. I like this.
    medication costs
    ed meds online without doctor prescription
    prescription pricing
    canadian drugs
    canadadrugs – https://www.canadianonlinepharmacytrust.com/

    cheap prescription drugs Kak 86_fcef

    Your comment is awaiting moderation.
  11. Regards. Ample forum posts.

    canadapharmacyonline com
    canadian pharmacy king
    canadian drugstore reviews
    canadianpharmacy
    discount prescription drug – https://www.canadianonlinepharmacytrust.com/

    online pharmacies no prescription maL 8aa9fa9

    Your comment is awaiting moderation.
  12. Many thanks. Ample material!

    prescription without a doctor’s prescription
    best 10 online canadian pharmacies
    drugs from canada with prescription
    canadian drug store
    canadian pharmacy drugs online – https://canadianpharmaciescubarx.com/

    pharmacy prices gob e60b0c2

    Your comment is awaiting moderation.
  13. Really lots of beneficial facts.
    mexican pharmacies online
    canadian drug
    online pharmacy canada
    canada pharmaceuticals online
    mexican online pharmacies – https://canadianpharmaciescubarx.com/

    best canadian online pharmacy Mi 2e60b0c

    Your comment is awaiting moderation.
  14. You mentioned it effectively.
    canadian pharcharmy online
    viagra from canada
    best online pharmacy stores
    canadian pharcharmy
    prescription cost comparison – http://canadianpharmacyntv.com/

    canada pharmacy online hilt ef48aa9

    Your comment is awaiting moderation.
  15. Incredible many of excellent information.
    canadian pharmacy online
    canadian pharmaceuticals online
    canadian discount pharmacy
    canadian drugs
    buy online prescription drugs – https://www.canadianonlinepharmacytrust.com/

    rx price comparison wah 684_fce

    Your comment is awaiting moderation.
  16. Cheers! I appreciate this!
    prescription cost
    canadian pharmacy
    canadadrugs.com pharmacy
    canadian pharmacies that ship to us
    canadian rx – http://canadianpharmacyntv.com/

    web medical information Ol f8b1dc3

    Your comment is awaiting moderation.
  17. Nicely put. Appreciate it.
    prescription drugs without prior prescription
    canadian online pharmacies
    buying prescription drugs canada
    london drugs canada
    prescription drugs from canada online – https://www.canadianonlinepharmacytrust.com/

    price pro pharmacy canada kn a9fa90f

    Your comment is awaiting moderation.
  18. Kudos! Plenty of posts.

    online rx pharmacy
    canadian pharmaceuticals online reviews
    buying prescription drugs canada
    canadian pharmacies
    canada pharmacies online pharmacy – http://canadianpharmaceuticalsonlinerx.com/

    pharmacy prescription SIC 2e60b0c

    Your comment is awaiting moderation.
  19. Thanks. Very good stuff.
    canadian pharcharmy online no precipitation
    canadianpharmacy
    canadian pharcharmy online no precipitation
    canadian online pharmacies
    best online international pharmacies – http://canadianpharmaceuticalsonlinerx.com/

    best canadian pharmacies mor f48aa9f

    Your comment is awaiting moderation.
  20. Nicely put. With thanks.
    prescription drugs without prior prescription
    canadian pharcharmy
    mexican pharmacy online medications
    canadian pharmacy
    pharmacy tech – http://canadianpharmaceuticalsonlinerx.com/

    mexican pharmacies shipping to usa Quag 83_fcef

    Your comment is awaiting moderation.
  21. Nicely put. Appreciate it.
    pharmacy canada
    canadian pharmacy world
    best online pharmacy
    canadian pharcharmy
    rx pharmacy – http://canadianpharmaceuticalsonlinerx.com/

    mexican pharmacy online medications plen f8b1dc3

    Your comment is awaiting moderation.
  22. You made your stand extremely effectively..
    canadian pharmaceuticals online reviews
    canadian pharmaceuticals online
    discount pharmaceuticals
    london drugs canada
    online canadian pharmacies – https://www.canadianonlinepharmacytrust.com/

    buy prescription drugs canada Sew 84_fcef

    Your comment is awaiting moderation.
  23. Kudos! Loads of material!

    pharmacy northwest canada
    canadian pharcharmy
    pain meds online without doctor prescription
    canadian drug
    canadian prescription – https://canadianpharmaciescubarx.com/

    online canadian discount pharmacy Lox 6682_fc

    Your comment is awaiting moderation.
  24. Thank you! I like it!
    pharmacy prices compare
    canadian pharmacy drugs online
    pain meds online without doctor prescription
    north west pharmacy canada
    canadian discount pharmacy – https://www.canadianonlinepharmacytrust.com/

    canadian online pharmacies legitimate by aarp gaib dc32e60

    Your comment is awaiting moderation.
  25. You actually explained this terrifically.
    trust pharmacy canada
    canadian pharcharmy
    meds online
    canadianpharmacyservice.com
    canada online pharmacy – https://www.canadianonlinepharmacytrust.com/

    canadian king pharmacy Dix aa9fa90

    Your comment is awaiting moderation.
  26. Whoa many of very good tips.
    cheap medications
    best 10 online canadian pharmacies
    price prescription drugs
    canadian pharcharmy
    online pharmacies in usa – http://canadianpharmaceuticalsonlinerx.com/

    canada drugs hap 0faf8b1

    Your comment is awaiting moderation.
  27. Perfectly expressed really. .
    pharmacy prices compare
    online canadian pharmacy
    canadian pharmaceuticals online
    canada rx
    online pharmacies no prescription – https://www.canadianonlinepharmacytrust.com/

    pharmacy prescription muts b0c2366

    Your comment is awaiting moderation.
  28. You actually explained this effectively!
    canadapharmacyonline
    canadian pharmaceuticals online
    canada pharmacy no prescription
    canadian pharmacy world
    international drug mart canadian pharmacy online store – http://canadianpharmaceuticalsonlinerx.com/

    pharmacy online duct 6682_fc

    Your comment is awaiting moderation.
  29. Excellent info. Thanks!
    canadian pharmacy viagra brand
    canadian viagra
    online pharmacies of canada
    canadian pharmacy king
    candrugstore com – http://canadianpharmaceuticalsonlinerx.com/

    mail order pharmacy st 6680_fc

    Your comment is awaiting moderation.
  30. Regards. Excellent stuff!
    drug price
    ed meds online without doctor prescription
    discount prescription drug
    canada pharmaceuticals online
    no prescription pharmacy – https://canadianpharmaciescubarx.com/

    online pharmacies in usa Cic 6688_fc

    Your comment is awaiting moderation.
  31. You actually said it wonderfully.
    canada pharmacy
    canadian pharmacy drugs online
    mail order pharmacies
    canadianpharmacy
    canadian online pharmacies legitimate – http://canadianpharmaceuticalsonlinerx.com/

    canadian discount pharmacy Type ef48aa9

    Your comment is awaiting moderation.
  32. Truly many of superb information.
    get prescription online
    canadian pharcharmy
    ordering prescriptions from canada legally
    canadian viagra
    international pharmacies that ship to the usa – https://www.canadianonlinepharmacytrust.com/

    canadian pharmacy reviews gamn 36688_f

    Your comment is awaiting moderation.
  33. Kudos! I appreciate this.
    canada prescription plus pharmacy
    canadian drugs
    mexican pharmacies online
    canadian pharmacies online
    legal canadian prescription drugs online – https://canadianpharmaciescubarx.com/

    canada viagra GeSs 60b0c23

    Your comment is awaiting moderation.
  34. Reliable advice. Kudos.
    best online international pharmacies
    canadian pharmacies online
    canadian drugs without prescription
    canadian drug
    king pharmacy – https://canadianpharmaciescubarx.com/

    canadian prescriptions online kt 60b0c23

    Your comment is awaiting moderation.
  35. Regards. Plenty of facts.

    online pharmacy canada
    canadian pharmacies that ship to us
    cheap drugs online
    northwest pharmacy/com
    canadian pharmacies online – http://canadianpharmacyntv.com/

    canada drug prices 8aa9fa9

    Your comment is awaiting moderation.
  36. You explained that superbly!
    canadian drugstore
    london drugs canada
    prescription discount
    canadian pharmacy
    online pharmacies of canada – http://canadianpharmacyntv.com/

    mexican pharmacy online Pt 236688_

    Your comment is awaiting moderation.
  37. Wow a lot of useful info.
    cheap drugs online
    canadian pharmaceuticals online reviews
    viagra canada
    canada pharmacy online
    pharmacy prices compare – http://canadianpharmaceuticalsonlinerx.com/

    canadianpharmacyservice.com Sak c32e60b

    Your comment is awaiting moderation.
  38. Whoa loads of wonderful facts!
    cheap canadian drugs
    ed meds online without doctor prescription
    cheap canadian drugs
    canadian pharmaceuticals online
    buying prescription drugs canada – http://canadianpharmaceuticalsonlinerx.com/

    my canadian pharmacy rele 8b1dc32

    Your comment is awaiting moderation.
  39. Really plenty of valuable facts.
    visit poster’s website
    canadian pharmacy
    best canadian pharmacies
    order prescriptions online without doctor
    northwestpharmacy – http://canadianpharmacyntv.com/

    prescription without a doctor’s prescription el 2e60b0c

    Your comment is awaiting moderation.
  40. Cheers. Great stuff!
    most reliable canadian pharmacies
    canadian pharmacies that ship to us
    mexican pharmacies online
    ed meds online without doctor prescription
    drugs from canada with prescription – http://canadianpharmaceuticalsonlinerx.com/

    canadian drugs without prescription semn 681_fce

    Your comment is awaiting moderation.
  41. Thank you! Useful stuff.
    canadianpharmacyservice.com
    canadian pharmacy
    prescription cost
    online drugstore
    trusted overseas pharmacies – http://canadianpharmacyntv.com/

    northwestpharmacy Jews ef48aa9

    Your comment is awaiting moderation.
  42. Cheers! Excellent stuff!
    canada prescription plus pharmacy
    canadian online pharmacies legitimate
    pharmacy price comparison
    canadian drug
    pharmacy northwest canada – http://canadianpharmacyntv.com/

    prescription prices comparison son b0c2366

    Your comment is awaiting moderation.
  43. Terrific content, Thanks a lot!
    list of legitimate canadian pharmacies
    online drugstore
    best 10 online canadian pharmacies
    canadian pharcharmy
    mexican pharmacy online medications – https://www.canadianonlinepharmacytrust.com/

    canada pharmacy no prescription slax ef48aa9

    Your comment is awaiting moderation.
  44. Thanks. Great information.
    legitimate online pharmacies
    online pharmacies
    canadian pharmacy viagra brandcanadian pharmaceuticals online
    canadian pharmacy
    canadadrugsonline – https://www.canadianonlinepharmacytrust.com/

    northwest pharmacy/com lila 60b0c23

    Your comment is awaiting moderation.
  45. Superb content. Kudos.
    overseas pharmacies
    canadian pharmacy king
    mexican pharmacy online medications
    cheap drugs
    canadian pharmacy no prescription – http://canadianpharmaceuticalsonlinerx.com/

    northwest pharmacy canada Nutt 0faf8b1

    Your comment is awaiting moderation.
  46. Nicely put. Regards.
    pharmacies in canada
    buy medication without an rx
    rx price comparison
    canadian pharmacies
    canada pharmacy online orders – https://www.canadianonlinepharmacytrust.com/

    web medical information pam f8b1dc3

    Your comment is awaiting moderation.
  47. Wow plenty of awesome material.
    best canadian pharmacies
    canada online pharmacies
    canadian pharmacy uk delivery
    northwestpharmacy
    online pharmacies no prescription – https://www.canadianonlinepharmacytrust.com/

    prescription drug price comparison Pn ef48aa9

    Your comment is awaiting moderation.
  48. Amazing a good deal of very good info!
    legitimate online pharmacies
    canadian online pharmacy
    canadian prescriptions
    canadian pharcharmy online
    canadian drugs – https://www.canadianonlinepharmacytrust.com/

    viagra from canada Dush 2e60b0c

    Your comment is awaiting moderation.
  49. Thank you, Lots of information!

    online pharmacy reviews
    canadian pharmaceuticals online reviews
    cheap prescription drugs
    canada pharmacy online
    canadapharmacyonline com – https://www.canadianonlinepharmacytrust.com/

    buy drugs online oa 1dc32e6

    Your comment is awaiting moderation.
  50. You actually expressed that terrifically.
    canadian online pharmacy reviews
    buy medication without an rx
    canada online pharmacy
    canadian drugs
    pharmacies near me – http://canadianpharmacyntv.com/

    buy prescription drugs without doctor mork 1dc32e6

    Your comment is awaiting moderation.

Leave a Reply

Your email address will not be published. Required fields are marked *

Powered by WordPress & Theme by Anders Norén