Performance requirements - Revision history

105.232.255.113 at 20:33, 19 September 2021

2021-09-19T20:33:54Z

← Older revision		Revision as of 20:33, 19 September 2021
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	* Suspension of performance.		* Suspension of performance.

−	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Construction_techniques]] [[Category:Design]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Property_development]]

Designing Buildings at 08:10, 17 January 2021

2021-01-17T08:10:55Z

← Older revision		Revision as of 08:10, 17 January 2021
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	* Suspension of performance.		* Suspension of performance.

−	[[Category:~~Construction_techniques~~]] [[Category:~~Design~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Construction_techniques]] [[Category:Design]]

Designing Buildings at 11:09, 9 February 2020

2020-02-09T11:09:49Z

← Older revision		Revision as of 11:09, 9 February 2020
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	‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end result should be achieved.		‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end result should be achieved.

−	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers and in the input of the contractor and other suppliers, but it can also make their task easier as they do not have to research different approaches. Performance requirements allow numerous interpretative designs which can bring time and cost savings as well as exploiting the available skills and materials.	+	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers and the input of the contractor and other suppliers, but it can also make their task easier as they do not have to research different approaches. Performance requirements allow numerous interpretative designs which can bring time and cost savings as well as exploiting the available skills and materials.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* Suspension of performance.		* Suspension of performance.

−	[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]	+	[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 10:59, 9 February 2020

2020-02-09T10:59:00Z

← Older revision		Revision as of 10:59, 9 February 2020
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−	Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances. ~~These~~ might be set out in briefing documentation, specifications, legislation and so on.	+	Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances. This is as opposed to prescriptive specifications which set out in precise detail how something should be done.
		+
		+	Performance requirements might be set out in briefing documentation, performance-based specifications, output-based specifications, legislation and so on.

	The design of a building can be divided into precise performance requirements which might include:		The design of a building can be divided into precise performance requirements which might include:
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	* Appearance.		* Appearance.
	* Durability.		* Durability.
−	* Strength ~~and stability~~.	+	* Strength
−	* Thermal performance ~~and comfort~~.	+	* Stability.
−	* ~~Dimensional stability~~.	+	* Thermal performance.
		+	* Comfort.
	* Weather tightness.		* Weather tightness.
	* Fire protection.		* Fire protection.
−	* Lighting ~~and ventilation~~.	+	* Lighting
−	* Security ~~and privacy~~.	+	* Ventilation.
		+	* Security.
		+	* Safety.
		+	* Privacy.
	* Energy efficiency.		* Energy efficiency.

−	No specific advice need be given to indicate how ~~these functions can~~ be achieved as long as they are achieved. ~~(In~~ the ~~case of~~ the Approved ~~Document of~~ the Building Regulations~~, some~~ suggestions ~~are given~~ which, if followed will achieve the required ~~values). Nevertheless, UK building regulations are regarded as being~~ performance ~~based~~.	+	No specific advice need necessarily be given to indicate how the specified standards should be achieved as long as they are achieved.
		+
		+	For example, the UK building regulations are regarded as being performance based, even though the Approved Documents to the Building Regulations provide suggestions, which, if followed will achieve the required performance. .

	An example would be:		An example would be:
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	‘The walls should be constructed to achieve a U-value of xW/m2/°K’ where ‘x’ is the value to be attained. This is a performance-based requirement as it stipulates that the wall must perform to the stated U-value (in terms of thermal efficiency) but it does not specify how it might be achieved.		‘The walls should be constructed to achieve a U-value of xW/m2/°K’ where ‘x’ is the value to be attained. This is a performance-based requirement as it stipulates that the wall must perform to the stated U-value (in terms of thermal efficiency) but it does not specify how it might be achieved.

−	The opposite of performance requirements is ‘prescriptive requirements’ where, in the case of a wall ~~(as given above)~~ the requirement may specify (ie ‘prescribe’) a specific size, materials and a set of construction techniques to achieve the required value.	+	The opposite of performance requirements are ‘prescriptive requirements’ where, in the case of a wall the requirement may specify (ie ‘prescribe’) a specific size, materials and a set of construction techniques to achieve the required value.

	Typically, a prescriptive requirement might be as follows:		Typically, a prescriptive requirement might be as follows:
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	‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end result should be achieved.		‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end result should be achieved.

−	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ~~ways of doing things~~.	+	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers and in the input of the contractor and other suppliers, but it can also make their task easier as they do not have to research different approaches. Performance requirements allow numerous interpretative designs which can bring time and cost savings as well as exploiting the available skills and materials.
−		+
−	~~With prescriptive requirements, there is usually little or no choice as to how things can be done. In contrast, performance~~ requirements allow numerous interpretative designs which can bring time and cost savings as well as exploiting the available skills and materials.	+

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

Designing Buildings at 10:50, 9 February 2020

2020-02-09T10:50:31Z

← Older revision		Revision as of 10:50, 9 February 2020
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	Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances. These might be set out in briefing documentation, specifications, legislation and so on.		Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances. These might be set out in briefing documentation, specifications, legislation and so on.

−	The design of a building can be divided into precise performance requirements which ~~must be established under the various functions that a building must typically achieve. These~~ might include:	+	The design of a building can be divided into precise performance requirements which might include:

	* Cost.		* Cost.

Designing Buildings at 10:46, 28 December 2019

2019-12-28T10:46:23Z

← Older revision		Revision as of 10:46, 28 December 2019
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	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

		+	* BREEAM performance targets.
	* Brief.		* Brief.
	* Key performance indicators.		* Key performance indicators.

Designing Buildings at 14:17, 26 November 2019

2019-11-26T14:17:26Z

← Older revision		Revision as of 14:17, 26 November 2019
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−	Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances.	+	Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances. These might be set out in briefing documentation, specifications, legislation and so on.

−	The design of a building can be divided into precise performance requirements which must be established under the various functions that a building must typically achieve. These ~~can~~ include:	+	The design of a building can be divided into precise performance requirements which must be established under the various functions that a building must typically achieve. These might include:

−	* Cost	+	* Cost.
−	* Appearance	+	* Capacity.
−	* Durability	+	* Appearance.
−	* Strength and stability	+	* Durability.
−	* Thermal performance	+	* Strength and stability.
−	* Dimensional stability	+	* Thermal performance and comfort.
−	* Weather tightness	+	* Dimensional stability.
−	* Fire protection	+	* Weather tightness.
−	* Lighting and ventilation	+	* Fire protection.
−	* Security	+	* Lighting and ventilation.
		+	* Security and privacy.
		+	* Energy efficiency.

	No specific advice need be given to indicate how these functions can be achieved as long as they are achieved. (In the case of the Approved Document of the Building Regulations, some suggestions are given which, if followed will achieve the required values). Nevertheless, UK building regulations are regarded as being performance based.		No specific advice need be given to indicate how these functions can be achieved as long as they are achieved. (In the case of the Approved Document of the Building Regulations, some suggestions are given which, if followed will achieve the required values). Nevertheless, UK building regulations are regarded as being performance based.
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	‘The walls should be constructed to achieve a U-value of xW/m2/°K’ where ‘x’ is the value to be attained. This is a performance-based requirement as it stipulates that the wall must perform to the stated U-value (in terms of thermal efficiency) but it does not specify how it might be achieved.		‘The walls should be constructed to achieve a U-value of xW/m2/°K’ where ‘x’ is the value to be attained. This is a performance-based requirement as it stipulates that the wall must perform to the stated U-value (in terms of thermal efficiency) but it does not specify how it might be achieved.

−	The opposite is a ‘prescriptive ~~requirement’~~ where, in the case of a wall (as given above) the requirement may specify (ie ‘prescribe’) a specific set of construction techniques to achieve the required value.	+	The opposite of performance requirements is ‘prescriptive requirements’ where, in the case of a wall (as given above) the requirement may specify (ie ‘prescribe’) a specific size, materials and a set of construction techniques to achieve the required value.

	Typically, a prescriptive requirement might be as follows:		Typically, a prescriptive requirement might be as follows:

−	‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end-result should be achieved.	+	‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end result should be achieved.

	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ways of doing things.		It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ways of doing things.

−	With prescriptive requirements there is usually little or no choice as to how things can be done. In contrast, performance requirements allow numerous interpretative designs which can bring time and cost savings as well as ~~exploit~~ the available skills and materials.	+	With prescriptive requirements, there is usually little or no choice as to how things can be done. In contrast, performance requirements allow numerous interpretative designs which can bring time and cost savings as well as exploiting the available skills and materials.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

		+	* Brief.
	* Key performance indicators.		* Key performance indicators.
	* Milestones.		* Milestones.
		+	* Output-based specification.
	* Performance bond.		* Performance bond.
	* Performance gap.		* Performance gap.
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	* Performance specification.		* Performance specification.
	* Performance specified work.		* Performance specified work.
		+	* Specification.
	* Suspension of performance.		* Suspension of performance.

	[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]		[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]

Editor at 19:05, 3 October 2019

2019-10-03T19:05:25Z

← Older revision		Revision as of 19:05, 3 October 2019
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	{\|		{\|
−	\| [[File:~~Checklist 800~~.jpg]]	+	\| [[File:Checklist_800.jpg\|link=File:Checklist_800.jpg]]
	\|}		\|}

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	Typically, a prescriptive requirement might be as follows:		Typically, a prescriptive requirement might be as follows:

−	~~<br />~~	+	‘To achieve the required U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the end-result should be achieved.
−	‘To achieve ~~an x~~ U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the ~~required~~ end-result should be achieved.	+

	It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ways of doing things.		It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ways of doing things.

Editor: Created page with "{| | File:Checklist 800.jpg |} Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achiev..."

2019-10-03T19:04:21Z

Created page with "{| | File:Checklist 800.jpg |} Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achiev..."

New page

{|
| [[File:Checklist 800.jpg]]
|}

Performance requirements typically comprise a set of criteria which stipulate how things should perform or the standards that they must achieve in a specific set of circumstances.

The design of a building can be divided into precise performance requirements which must be established under the various functions that a building must typically achieve. These can include:

* Cost
* Appearance
* Durability
* Strength and stability
* Thermal performance
* Dimensional stability
* Weather tightness
* Fire protection
* Lighting and ventilation
* Security

No specific advice need be given to indicate how these functions can be achieved as long as they are achieved. (In the case of the Approved Document of the Building Regulations, some suggestions are given which, if followed will achieve the required values). Nevertheless, UK building regulations are regarded as being performance based.

An example would be:

‘The walls should be constructed to achieve a U-value of xW/m2/°K’ where ‘x’ is the value to be attained. This is a performance-based requirement as it stipulates that the wall must perform to the stated U-value (in terms of thermal efficiency) but it does not specify how it might be achieved.

The opposite is a ‘prescriptive requirement’ where, in the case of a wall (as given above) the requirement may specify (ie ‘prescribe’) a specific set of construction techniques to achieve the required value.

Typically, a prescriptive requirement might be as follows:

<br />
‘To achieve an x U-value, external walls should be constructed with 102mm facing brick, 75mm of insulation, 50mm clear cavity, 100mm internal blockwork and 25mm internal plaster.’ This prescribes a method of building, giving precise instructions as to how the required end-result should be achieved.

It is usually assumed that in a prescriptive scenario, what is prescribed has been shown to work. Although it limits the creativity of designers, it can also make their task easier as they do not have to research different ways of doing things.

With prescriptive requirements there is usually little or no choice as to how things can be done. In contrast, performance requirements allow numerous interpretative designs which can bring time and cost savings as well as exploit the available skills and materials.

= Related articles on Designing Buildings Wiki =

* Key performance indicators.
* Milestones.
* Performance bond.
* Performance gap.
* Performance in use of completed buildings.
* Performance specification.
* Performance specified work.
* Suspension of performance.

[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]