The Just In Time concept in construction - Revision history

Tkokotas at 13:35, 19 November 2018

2018-11-19T13:35:49Z

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			''Developed by Lasse Hybel''


	The construction industry is mainly project based, and renowned to be inefficient with low productivity, and to be an industry that often encounters difficulties with keeping time schedules due to delays during the construction period. Concerning the construction management, the introduction of the Just-in-time (JIT) concept can be advantageous, when managing the logistics of the building materials and workforce on the building sites.		The construction industry is mainly project based, and renowned to be inefficient with low productivity, and to be an industry that often encounters difficulties with keeping time schedules due to delays during the construction period. Concerning the construction management, the introduction of the Just-in-time (JIT) concept can be advantageous, when managing the logistics of the building materials and workforce on the building sites.
	The JIT philosophy was originally developed for the manufacturing industry, where it is a method of forwarding materiel or work from one process to the next, at the moment where it is required at the succeeding process. Thus, reducing work-in-process inventory, production cycle times since less time is spend on queuing before being processed and the reduction of flow variation, resulting in continuous ongoing improvements.		The JIT philosophy was originally developed for the manufacturing industry, where it is a method of forwarding materiel or work from one process to the next, at the moment where it is required at the succeeding process. Thus, reducing work-in-process inventory, production cycle times since less time is spend on queuing before being processed and the reduction of flow variation, resulting in continuous ongoing improvements.

S133577: /* Benefits of JIT in construction */

2017-06-22T09:07:13Z

Benefits of JIT in construction

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	In addition to the previous discussed benefits of utilizing JIT, Pheng and Shang reports the following possible benefits <ref name="art7">Sui Pheng, L. & Shang, G. (2011): The Application of the Just-In-Time Philosophy in the Chinese construction industry. Journal of construction in developing Countries.</ref>:		In addition to the previous discussed benefits of utilizing JIT, Pheng and Shang reports the following possible benefits <ref name="art7">Sui Pheng, L. & Shang, G. (2011): The Application of the Just-In-Time Philosophy in the Chinese construction industry. Journal of construction in developing Countries.</ref>:

	- Increasing the competitive advantage of firms in terms of consistently and continuously meeting costumer’s requirements.		* Increasing the competitive advantage of firms in terms of consistently and continuously meeting costumer’s requirements.

	- Improving quality of construction materials and components		* Improving quality of construction materials and components

	- Increase in productivity.		* Increase in productivity.

	- Reduced costs due to minimized inventories		* Reduced costs due to minimized inventories

	- Improved relationship with supplier		* Improved relationship with supplier

	- Work completed ahead of time schedule		* Work completed ahead of time schedule

	- Improving the tidiness of the construction site		* Improving the tidiness of the construction site

	- Elimination of site congestion and reduced inconvenience experienced by neighbors		* Elimination of site congestion and reduced inconvenience experienced by neighbors

	However, these possible benefits can not be achieved without initial investments. For example, more advanced equipment and more skilled employees are required, if the setup time is to be reduced.		However, these possible benefits can not be achieved without initial investments. For example, more advanced equipment and more skilled employees are required, if the setup time is to be reduced.

S133577: /* Lean Philosophy */

2017-06-22T07:53:28Z

Lean Philosophy

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	* Precisely specify value from the ultimate costumer’s perspective		* Precisely specify value from the ultimate costumer’s perspective

	- Identify the value delivery process (Value stream) – Eliminate non-value adding steps		* Identify the value delivery process (Value stream) – Eliminate non-value adding steps

	- Make the value adding steps flow without interruption		* Make the value adding steps flow without interruption

	- Establish a pull from the costumer. Do not produce until it is needed.		* Establish a pull from the costumer. Do not produce until it is needed.

	- Pursue perfection		* Pursue perfection

	These principles all concerns the problem of waste, or <span class="plainlinks">[https://en.wikipedia.org/wiki/Muda_(Japanese_term) Muda]</span> in Japanese. Activities or processes that takes up resources without creating value, which should be eliminated in order to deliver things right at the right time - For the good of the producer and the costumer. The different types of waste that can occur in a production, were defined by Wormack and Jones <ref name="art11">Wormack, J. P. & Jones, T. D. : Lean thinking: Banish waste and create wealth in your corporation.</ref>:		These principles all concerns the problem of waste, or <span class="plainlinks">[https://en.wikipedia.org/wiki/Muda_(Japanese_term) Muda]</span> in Japanese. Activities or processes that takes up resources without creating value, which should be eliminated in order to deliver things right at the right time - For the good of the producer and the costumer. The different types of waste that can occur in a production, were defined by Wormack and Jones <ref name="art11">Wormack, J. P. & Jones, T. D. : Lean thinking: Banish waste and create wealth in your corporation.</ref>:

	- Defects in products		* Defects in products

	- Overproduction of items no one wants;		* Overproduction of items no one wants;

	- Inventory waiting to be processed;		* Inventory waiting to be processed;

	- Unneeded processing;		* Unneeded processing;

	- Unnecessary transport of goods;		* Unnecessary transport of goods;

	- People waiting for input to work on;		* People waiting for input to work on;

	- Design of goods and services that do not satisfy customer needs.		* Design of goods and services that do not satisfy customer needs.

	In order to achieve an optimal production without waste, the following concepts and ideas have been developed as management tools.		In order to achieve an optimal production without waste, the following concepts and ideas have been developed as management tools.

S133577: /* Lean Philosophy */

2017-06-22T07:52:51Z

Lean Philosophy

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	- Precisely specify value from the ultimate costumer’s perspective		* Precisely specify value from the ultimate costumer’s perspective

	- Identify the value delivery process (Value stream) – Eliminate non-value adding steps		- Identify the value delivery process (Value stream) – Eliminate non-value adding steps

S133577: /* Annotated Bibliography */

2017-06-22T07:40:52Z

Annotated Bibliography

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	''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''		''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''

	''A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.		''A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed. The authors introduces the concept of 'Byggelogistik', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.''
	The authors introduces the concept of 'Byggelogistik', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.''

	== References ==		== References ==

	<references/>		<references/>

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Annotated Bibliography

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	''A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.		''A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.
	The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.''		The authors introduces the concept of 'Byggelogistik', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.''

	== References ==		== References ==

	<references/>		<references/>

S133577: /* Annotated Bibliography */

2017-06-22T07:40:06Z

Annotated Bibliography

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	'''Nielsen, A. S. & Kristensen, E. L. (2002): Paper 3: Lean Construction. En redegørelse for the amerikanske produktionskoncept - Lean Construction - udviklet mhp. en effektivisering og reorganisering af byggeprocessen:'''		'''Nielsen, A. S. & Kristensen, E. L. (2002): Paper 3: Lean Construction. En redegørelse for the amerikanske produktionskoncept - Lean Construction - udviklet mhp. en effektivisering og reorganisering af byggeprocessen:'''

	An extensive paper in three parts regarding several aspects of lean construction. The first part gives a general introduction to the background for the development of lean construction. Second part presents the TFV theory, that tries to combine three different views of production. In the third part, practical tools and methods for the transition towards lean construction are discussed.		''An extensive paper in three parts regarding several aspects of lean construction. The first part gives a general introduction to the background for the development of lean construction. Second part presents the TFV theory, that tries to combine three different views of production. In the third part, practical tools and methods for the transition towards lean construction are discussed.''

	''' Ballard, G. & Howell, G. : Toward Construction JIT: '''		''' Ballard, G. & Howell, G. : Toward Construction JIT: '''

	Ballard and Howell strives to identify the differences in the manufacturing- and the construction industry and discusses how these differences complicates the introduction of the Just-In-Time concept into the construction industry. They identify the buffers traditionally utilized in the industry, and they are thought optimized.		''Ballard and Howell strives to identify the differences in the manufacturing- and the construction industry and discusses how these differences complicates the introduction of the Just-In-Time concept into the construction industry. They identify the buffers traditionally utilized in the industry, and they are thought optimized.''

	''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''		''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''

	A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.		''A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.
	The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.		The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.''

	== References ==		== References ==

	<references/>		<references/>

S133577: /* Annotated Bibliography */

2017-06-22T07:39:29Z

Annotated Bibliography

← Older revision		Revision as of 07:39, 22 June 2017
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	''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''		''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''

	A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.		A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.
	The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.		The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.

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2017-06-22T07:39:15Z

Annotated Bibliography

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	== Annotated Bibliography ==		== Annotated Bibliography ==

	'''Nielsen, A. S. & Kristensen, E. L. (2002): Paper 3: Lean Construction. En redegørelse for the amerikanske produktionskoncept - Lean Construction - udviklet mhp. en effektivisering og reorganisering af byggeprocessen:''' An extensive paper in three parts regarding several aspects of lean construction. The first part gives a general introduction to the background for the development of lean construction. Second part presents the TFV theory, that tries to combine three different views of production. In the third part, practical tools and methods for the transition towards lean construction are discussed.		'''Nielsen, A. S. & Kristensen, E. L. (2002): Paper 3: Lean Construction. En redegørelse for the amerikanske produktionskoncept - Lean Construction - udviklet mhp. en effektivisering og reorganisering af byggeprocessen:'''

	~~''' Ballard, G~~. ~~& Howell, G. : Toward Construction JIT: ''' Ballard and Howell tries~~ to ~~identify~~ the ~~differences in the manufacturing- and~~ the construction ~~industry and discusses how these differences complicates~~ the ~~introduction~~ of ~~the Just-~~In~~-Time concept into the construction industry. They identify~~ the ~~buffers traditionally utilized in the industry~~, and ~~they~~ are ~~thought optimized~~.		An extensive paper in three parts regarding several aspects of lean construction. The first part gives a general introduction to the background for the development of lean construction. Second part presents the TFV theory, that tries to combine three different views of production. In the third part, practical tools and methods for the transition towards lean construction are discussed.

	''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :''' A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.		''' Ballard, G. & Howell, G. : Toward Construction JIT: '''

			Ballard and Howell strives to identify the differences in the manufacturing- and the construction industry and discusses how these differences complicates the introduction of the Just-In-Time concept into the construction industry. They identify the buffers traditionally utilized in the industry, and they are thought optimized.

			''' Bertelsen, S. ; Nielsen, J. (1997). Just in time Logistics in the supply of building materials. 1st international Conference on Construction Industry Development: Building the future Together. :'''

			A brief description of the framework of how traditionally logistics in the construction industry is viewed. The experiments conducted regarding new ways of organizing the cooperation between the companies which are responsible for the final product - the house, are discussed.
	The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.		The authors introduces the concept of ''Byggelogistik'', which is characterized by careful planning, daily management executed from the building site - not the head office - and immediate and direct feed back of all mistakes.

S133577: /* Strategy for JIT implementation in construction */

2017-06-22T07:37:10Z

Strategy for JIT implementation in construction

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	''' Place plan buffers and make ready processes in front of each production processes: '''		''' Place plan buffers and make ready processes in front of each production processes: '''
	The hypothesis is that production can indeed be shielded from upstream uncertainty through planning~~, why~~ the use of the last planner system should be increased. ~~Thus, the~~ last planner method of detailed production planning shields production from uncertainties upstream. This will ideally result in the revelation of sources of variation and uncertainty which will enhance the productivity while releasing resources for further improvement of the performance of the process shielded, and provide a highly predictable work flow in the near-term to processes downstream.		The hypothesis is that production can indeed be shielded from upstream uncertainty through planning. Thus the use of the last planner system should be increased. The benefits will thus be: The last planner method of detailed production planning shields production from uncertainties upstream. This will ideally result in the revelation of sources of variation and uncertainty which will enhance the productivity while releasing resources for further improvement of the performance of the process shielded, and provide a highly predictable work flow in the near-term to processes downstream.

	''' Progressively replace schedule buffers with plan buffers: '''		''' Progressively replace schedule buffers with plan buffers: '''