Abstraction of quantities - Revision history

Designing Buildings at 07:24, 23 February 2021

2021-02-23T07:24:19Z

← Older revision		Revision as of 07:24, 23 February 2021
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	* Without quantities.		* Without quantities.

−	[[Category:Construction_management]] [[Category:Cost_/_business_planning]] [[Category:Procurement]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Construction_management]] [[Category:Cost_/_business_planning]] [[Category:Procurement]]

Designing Buildings at 07:29, 24 March 2020

2020-03-24T07:29:08Z

← Older revision		Revision as of 07:29, 24 March 2020
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−	During the estimation process in construction, estimators will carry ~~out~~ a ~~technique called~~ ‘taking off’. ~~The term ‘taking off’~~ refers to the process of identifying elements of construction works that can be measured and priced ~~which~~ is necessary to produce bills of quantities. ~~The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process~~ of ~~collating all the~~ quantities ~~‘taken off’ into~~ a ~~single total of each element that can then be transferred into~~ the ~~bill of quantities~~.	+	During the estimation process in construction, estimators will carry undertake a process referred to as ‘taking off’. This refers to the process of identifying elements of construction works that can be measured and priced, and it is necessary to produce bills of quantities. Bills of quantities are issued to tenderers for them to prepare a price for carrying out the works described.

−	~~Quantities of the same items are captured on dimension/abstraction sheets. An example~~ can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area~~. For the final quantity calculations~~, ~~he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction~~, ~~he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities~~.	+	The elements can be measured in number, length, area, volume, weight or time.

−	The estimator will follow the ‘New rules of measurement’ as set out by the Royal Institute of Chartered Surveyors (RICS) to capture quantities for the abstraction. Depending on the project he will use one of the following standards:	+	Abstraction is the process of collating all the quantities ‘taken off’ into a single total for each element that can then be transferred into the bill of quantities.
		+
		+	Quantities of the same items are captured on dimension/abstraction sheets. For example, to capture of all quantities for facing brickwork, the estimator will start to measure the brickwork on drawings. They will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. As part of the abstraction, they will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.
		+
		+	The estimator will generally follow the ‘New rules of measurement’ as set out by the Royal Institute of Chartered Surveyors (RICS) to capture quantities for the abstraction. Depending on the project they will use one of the following standards:

	* NRM1: Order of cost estimating and cost planning for capital building works.		* NRM1: Order of cost estimating and cost planning for capital building works.
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	* NRM3 - Order of cost estimating and cost planning for building maintenance works.		* NRM3 - Order of cost estimating and cost planning for building maintenance works.

−	The rules of measurement will guide the estimator on the unit that has to be calculated for each element. ~~An example is for~~ facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be measured in m3 and the estimator will have to calculate the volume.	+	The rules of measurement will guide the estimator on the unit that has to be calculated for each element. For facing brickwork, the rules state that the unit applicable will be m2.

	Typical units classified in the New rules of measurement are:		Typical units classified in the New rules of measurement are:
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	* Bill of quantities software.		* Bill of quantities software.
	* Bill of quantities v Schedule of rates.		* Bill of quantities v Schedule of rates.
−	* Bill.
	* Common mistakes in bill of quantities.		* Common mistakes in bill of quantities.
	* How to take off construction works.		* How to take off construction works.

Editor2 at 08:57, 17 March 2020

2020-03-17T08:57:37Z

← Older revision		Revision as of 08:57, 17 March 2020
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	The rules of measurement will guide the estimator on the unit that has to be calculated for each element. An example is for facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be measured in m3 and the estimator will have to calculate the volume.		The rules of measurement will guide the estimator on the unit that has to be calculated for each element. An example is for facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be measured in m3 and the estimator will have to calculate the volume.

−	Typical units ~~can be~~ classified in the New rules of measurement as:	+	Typical units classified in the New rules of measurement are:

	* M (for length).		* M (for length).

Editor2 at 16:54, 16 March 2020

2020-03-16T16:54:10Z

← Older revision		Revision as of 16:54, 16 March 2020
Line 1:		Line 1:
−	During the estimation process in construction, estimators will carry out a ~~techique~~ called ‘taking off’. The term ‘taking off’ refers to the process of identifying elements of construction works that can be measured and priced~~. This~~ is necessary to produce bills of quantities. The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process of collating all the quantities ‘taken off’ into a single total of each element that can then be transferred into the bill of quantities.	+	During the estimation process in construction, estimators will carry out a technique called ‘taking off’. The term ‘taking off’ refers to the process of identifying elements of construction works that can be measured and priced which is necessary to produce bills of quantities. The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process of collating all the quantities ‘taken off’ into a single total of each element that can then be transferred into the bill of quantities.

	Quantities of the same items are captured on dimension/abstraction sheets. An example can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. For the final quantity calculations, he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction, he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.		Quantities of the same items are captured on dimension/abstraction sheets. An example can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. For the final quantity calculations, he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction, he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.
Line 9:		Line 9:
	* NRM3 - Order of cost estimating and cost planning for building maintenance works.		* NRM3 - Order of cost estimating and cost planning for building maintenance works.

−	The rules of measurement will guide the estimator on the unit that has to be calculated for each element. An example is for facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be ~~measures~~ in m3 and the estimator will have to calculate the volume.	+	The rules of measurement will guide the estimator on the unit that has to be calculated for each element. An example is for facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be measured in m3 and the estimator will have to calculate the volume.

	Typical units can be classified in the New rules of measurement as:		Typical units can be classified in the New rules of measurement as:
Line 19:		Line 19:
	* Nr (for items).		* Nr (for items).

−	The rules will also guide the estimator on which areas of measurements to include and exclude the abstraction of quantities.	+	The rules will also guide the estimator on which areas of measurements to include and exclude during the abstraction of quantities.

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

−	* Advantages of a bill of quantities	+	* Advantages of a bill of quantities.
−	* Approximate bill of quantities	+	* Approximate bill of quantities.
	* Approximate quantities.		* Approximate quantities.
	* Bill of quantities breakdown structures BQBS		* Bill of quantities breakdown structures BQBS
−	* Bill of quantities software	+	* Bill of quantities software.
	* Bill of quantities v Schedule of rates.		* Bill of quantities v Schedule of rates.
	* Bill.		* Bill.
−	* Common mistakes in bill of quantities	+	* Common mistakes in bill of quantities.
−	* How to take off construction works	+	* How to take off construction works.
−	* New Rules of Measurement	+	* New Rules of Measurement.
−	* Priced bill of quantities	+	* Priced bill of quantities.
	* Quantity.		* Quantity.
−	* Standard Method of Measurement SMM7	+	* Standard Method of Measurement SMM7.
−	* Taking off construction works	+	* Taking off construction works.
−	* Types of bill of quantities	+	* Types of bill of quantities.
	* Unpriced bill.		* Unpriced bill.
	* Without quantities.		* Without quantities.

	[[Category:Construction_management]] [[Category:Cost_/_business_planning]] [[Category:Procurement]]		[[Category:Construction_management]] [[Category:Cost_/_business_planning]] [[Category:Procurement]]

Editor2 at 10:33, 16 March 2020

2020-03-16T10:33:23Z

← Older revision		Revision as of 10:33, 16 March 2020
Line 1:		Line 1:
−	During the estimation process in construction, estimators will carry out a ~~process~~ called ‘taking off’. The term ‘taking off’ refers to the process of identifying elements of construction works that can be measured and priced. This is necessary to produce bills of quantities. The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process of collating all the quantities ‘taken off’ into a single total of each element that can then be transferred into the bill of quantities.	+	During the estimation process in construction, estimators will carry out a techique called ‘taking off’. The term ‘taking off’ refers to the process of identifying elements of construction works that can be measured and priced. This is necessary to produce bills of quantities. The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process of collating all the quantities ‘taken off’ into a single total of each element that can then be transferred into the bill of quantities.

	Quantities of the same items are captured on dimension/abstraction sheets. An example can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. For the final quantity calculations, he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction, he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.		Quantities of the same items are captured on dimension/abstraction sheets. An example can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. For the final quantity calculations, he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction, he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.

Editor2: Created page with "During the estimation process in construction, estimators will carry out a process called ‘taking off’. The term ‘taking off’ refers to the process of identifying element..."

2020-03-16T10:32:32Z

Created page with "During the estimation process in construction, estimators will carry out a process called ‘taking off’. The term ‘taking off’ refers to the process of identifying element..."

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During the estimation process in construction, estimators will carry out a process called ‘taking off’. The term ‘taking off’ refers to the process of identifying elements of construction works that can be measured and priced. This is necessary to produce bills of quantities. The elements can then be measured in number, length, area, volume, weight or time. Abstraction is the process of collating all the quantities ‘taken off’ into a single total of each element that can then be transferred into the bill of quantities.

Quantities of the same items are captured on dimension/abstraction sheets. An example can be the capture of all quantities for facing brickwork. The estimator will start to measure the brickwork of plan. He will generally measure the area of the wall and also capture the areas for windows and doors or any other features that will impact on the quantity of the facing brickwork area. For the final quantity calculations, he will deduct the windows and doors from the areas of the facing brickwork measured. As part of the abstraction, he will also round up figures. The estimator will then have a final quantity for all the facing brickwork that will be used in the bill of quantities.

The estimator will follow the ‘New rules of measurement’ as set out by the Royal Institute of Chartered Surveyors (RICS) to capture quantities for the abstraction. Depending on the project he will use one of the following standards:

* NRM1: Order of cost estimating and cost planning for capital building works.
* NRM2: Detailed measurement for building works.
* NRM3 - Order of cost estimating and cost planning for building maintenance works.

The rules of measurement will guide the estimator on the unit that has to be calculated for each element. An example is for facing brickwork, the rules state that the unit applicable will be m2. The estimator will prepare the abstraction of quantities for facing brickwork by measuring the length and height to calculate the area and group this in the various sections of facing brickwork. Some elements can be measures in m3 and the estimator will have to calculate the volume.

Typical units can be classified in the New rules of measurement as:

* M (for length).
* M2 (for the area).
* M3 (for volume).
* Tonne (for weight).
* Nr (for items).

The rules will also guide the estimator on which areas of measurements to include and exclude the abstraction of quantities.

= Related articles on Designing Buildings Wiki =

* Advantages of a bill of quantities
* Approximate bill of quantities
* Approximate quantities.
* Bill of quantities breakdown structures BQBS
* Bill of quantities software
* Bill of quantities v Schedule of rates.
* Bill.
* Common mistakes in bill of quantities
* How to take off construction works
* New Rules of Measurement
* Priced bill of quantities
* Quantity.
* Standard Method of Measurement SMM7
* Taking off construction works
* Types of bill of quantities
* Unpriced bill.
* Without quantities.

[[Category:Construction_management]] [[Category:Cost_/_business_planning]] [[Category:Procurement]]