Product breakdown structure - Revision history

S123932 at 11:09, 12 June 2017

2017-06-12T11:09:00Z

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	==Limitation==		==Limitation==

	Even though the PBS is a very powerful tool it still have its limitations. The PBS is focusing on the product and the WBS is focusing on the product and the work related with it, and therefore the PBS are at a isolated point of view not complete. Furthermore the PBS is depended on the		Even though the PBS is a very powerful tool it still have its limitations. The PBS is focusing on the product and the WBS is focusing on the product and the work related with it, and therefore the PBS are at a isolated point of view not complete. Furthermore the PBS is depended on its inputs, which from a "project scope management plan" point of view is the: Plane scope management, Collect Requirements, Define Scope. Furthermore its is known that these input is likely to change during the lifetime of the project.



	==References==		==References==

S123932: /* Limitation */

2017-06-12T11:01:47Z

Limitation

← Older revision		Revision as of 11:01, 12 June 2017
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	==Limitation==		==Limitation==

	The PBS is focusing on the product and the WBS is focusing on the product and the work related with it, and therefore the PBS are at a isolated point of view not complete.		Even though the PBS is a very powerful tool it still have its limitations. The PBS is focusing on the product and the WBS is focusing on the product and the work related with it, and therefore the PBS are at a isolated point of view not complete. Furthermore the PBS is depended on the

	==References==		==References==

S123932 at 10:38, 12 June 2017

2017-06-12T10:38:02Z

← Older revision		Revision as of 10:38, 12 June 2017
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	==Limitation==		==Limitation==

			The PBS is focusing on the product and the WBS is focusing on the product and the work related with it, and therefore the PBS are at a isolated point of view not complete.

	==References==		==References==

S123932 at 10:24, 12 June 2017

2017-06-12T10:24:33Z

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	<math>(P+4*M+O)/3</math>		<math>(P+4*M+O)/3</math>

			If desired the standard deviation of the Beta distribution is calculated by using the following equation.

			<math>(P-O)/6</math>

			The obtained prizes can now be added to give a estimation of the percentage applied to each product and sub product.

	==Limitation==		==Limitation==

	==References==		==References==

S123932 at 10:17, 12 June 2017

2017-06-12T10:17:06Z

← Older revision		Revision as of 10:17, 12 June 2017
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	The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house". Colorization has been added to the percentage indication. This has been done to create an illustration of the product and sub product structure. In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site, which has been taken into consideration when making the PBS example.		The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house". Colorization has been added to the percentage indication. This has been done to create an illustration of the product and sub product structure. In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site, which has been taken into consideration when making the PBS example.

	[[File:PBS_example.png]]		[[File:PBS_example.png\|850px]]


	===Dictionary===		===Dictionary===

S123932 at 09:50, 12 June 2017

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	====Example====		====Example====

	The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house". In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site, which has been taken into consideration when making the PBS example.		The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house". Colorization has been added to the percentage indication. This has been done to create an illustration of the product and sub product structure. In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site, which has been taken into consideration when making the PBS example.

	[[File:PBS_example.png]]		[[File:PBS_example.png]]

S123932 at 08:06, 12 June 2017

2017-06-12T08:06:07Z

← Older revision		Revision as of 08:06, 12 June 2017
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	===Applying the PBS diagram to cost overview===		===Applying the PBS diagram to cost overview===

	Under to assumption that the future is industrialized construction the PBS is foreseen to be a large part of the cost analyze. Given that a construction site would more or less have the same PBS template, a quick cost estimation can easily be made. Among the many different techniques for this process		Under to assumption that the future is industrialized construction the PBS is foreseen to be a large part of the cost analyze. Given that a construction site would more or less have the same PBS template, a quick cost estimation can easily be made. Among the many different techniques for this process the Three-point estimating process can be applied.

			According to the PBS the three point estimation is about gathering three different prizes for e.g. a kitchen module based on the three approaches being: P=Pessimistic, M=Most likely and O=optimistic.

			Based on the three prizes the following equations can be applied in order to calculate a "simple average" and a "weighted average".

			Triangular distribution "Simple average"

			<math>(P+M+O)/3</math>

			Beta distribution "Weigthed average"

			<math>(P+4*M+O)/3</math>

S123932 at 07:37, 12 June 2017

2017-06-12T07:37:24Z

← Older revision		Revision as of 07:37, 12 June 2017
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	===Applying the PBS diagram to cost overview===		===Applying the PBS diagram to cost overview===

			Under to assumption that the future is industrialized construction the PBS is foreseen to be a large part of the cost analyze. Given that a construction site would more or less have the same PBS template, a quick cost estimation can easily be made. Among the many different techniques for this process

S123932 at 07:27, 12 June 2017

2017-06-12T07:27:30Z

← Older revision		Revision as of 07:27, 12 June 2017
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	Furthermore there are invented some checkmarks, which can be beneficial to keep in mind when making the PBS.		Furthermore there are invented some checkmarks, which can be beneficial to keep in mind when making the PBS.

	1) The top box should always represent the final product.		1) The top box should always represent the final product.

	2) When making the decomposition "top down or bottom up", do not make more boxes than needed in order to sustain a suitable overview.		2) When making the decomposition "top down or bottom up", do not make more boxes than needed in order to sustain a suitable overview.

	3) Remember that the PBS only focuses on the product, not the work related to the project (WBS).		3) Remember that the PBS only focuses on the product, not the work related to the project (WBS).

	4) The product description be a beneficial reference point, when making the diagram.		4) The product description be a beneficial reference point, when making the diagram.

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	[[File:PBS_example.png]]		[[File:PBS_example.png]]

	===~~PBS dictionary~~===		===Dictionary===
	~~Even if~~ a ~~well structured~~ PBS ~~has been developed~~ it is ~~often a profitable~~ to ~~make~~ a description of the ~~different~~ boxes.		When making WBS a dictionary is typically made to describe the different boxes in detail. Because the PBS is contributing to the WBS then it makes no sense to make a specific dictionary for the PBS, however it is advised to include a detailed description of the many products e.g. the wall elements will not all be the same due to placement of door and window openings. The dictionary can also include a document where the project managers approval is needed when starting up with a new task. In this way the constructors can get the knowledge of which boxes, that has to be initiated before others, so these will not conflict with each other.

	===Applying the PBS diagram to cost overview===		===Applying the PBS diagram to cost overview===

S123932 at 07:10, 12 June 2017

2017-06-12T07:10:56Z

← Older revision		Revision as of 07:10, 12 June 2017
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	===Performing the breakdown structure===		===Performing the breakdown structure===
	The technique applied for dividing and subdividing the delivered product into smaller bits is decomposition. The decomposition advised to be made by setting up a group of competent people, since this often requires multiple insight perspectives. The main reason for the breakdown structure is to take something largely complex and break in down into smaller bits in order to take in more simple to handle. The breakdown process should be made in a way such as the size of the current products package makes sense. When it comes to prefabricated elements, it would make sense at least not to breakdown any more than the delivered product. Also based on the desired complexity of the PBS the decomposition can also be made in relation to the deliverables, meaning if the project is supposed to be inspected in milestones, then it would be preferable that the PBS would be divided into matching the project milestones. The making of the PBS can either be done by the top-down or bottom-up approach, according to what the project manager finds to be the most convenient.		The technique applied for dividing and subdividing the delivered product into smaller bits is decomposition. The decomposition advised to be made by setting up a group of competent people, since this often requires multiple insight perspectives. The main reason for the breakdown structure is to take something largely complex and break in down into smaller bits in order to take in more simple to handle. The breakdown process should be made in a way such as the size of the current products package makes sense. When it comes to prefabricated elements, it would make sense at least not to breakdown any more than the delivered product. Also based on the desired complexity of the PBS the decomposition can also be made in relation to the deliverables, meaning if the project is supposed to be inspected in milestones, then it would be preferable that the PBS would be divided into matching the project milestones. The making of the PBS can either be done by the top-down or bottom-up approach, according to what the project manager finds to be the most convenient.

	~~In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site~~

	===Making the PBS diagram===		===Making the PBS diagram===
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	====Example====		====Example====

	The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house".		The figure below illustrates how the diagram can be applied when making af PBS of a one family house. Also note that the different boxes has been applied with a percentage, which refers to how much the given product poses of the end product "The house". In industrialized construction of hospitals and hotels and larger compartments, a bathroom has even been proven to be delivered as one whole product on site, which has been taken into consideration when making the PBS example.

	[[File:PBS_example.png]]		[[File:PBS_example.png]]