Scheduling construction activities - Revision history

Editor at 19:39, 5 August 2025

2025-08-05T19:39:49Z

← Older revision		Revision as of 19:39, 5 August 2025
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	--[[User:CIOB\|CIOB]]		--[[User:CIOB\|CIOB]]

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Acceleration of construction works.		* Acceleration of construction works.

Editor at 20:08, 21 January 2021

2021-01-21T20:08:37Z

← Older revision		Revision as of 20:08, 21 January 2021
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	* Time-location chart.		* Time-location chart.
	* Time management of construction projects.		* Time management of construction projects.
		+	* Wiest-Levy method.
	* Work breakdown structure		* Work breakdown structure

Editor at 16:42, 18 January 2021

2021-01-18T16:42:38Z

← Older revision		Revision as of 16:42, 18 January 2021
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	* Progress of construction works.		* Progress of construction works.
	* Project crashing.		* Project crashing.
		+	* Resource allocation in design and construction.
	* Resource leveling.		* Resource leveling.
	* Resource management.		* Resource management.

Designing Buildings at 08:03, 17 September 2020

2020-09-17T08:03:21Z

← Older revision		Revision as of 08:03, 17 September 2020
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	* [https://www.projectcubicle.com/total-float-versus-free-float-scheduling/ Total Float vs Free Float in Scheduling]		* [https://www.projectcubicle.com/total-float-versus-free-float-scheduling/ Total Float vs Free Float in Scheduling]

−	[[Category:Construction_management]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Construction_management]]

Editor at 19:31, 7 August 2019

2019-08-07T19:31:39Z

← Older revision		Revision as of 19:31, 7 August 2019
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	* Time-location chart.		* Time-location chart.
	* Time management of construction projects.		* Time management of construction projects.
		+	* Work breakdown structure

	= External references =		= External references =

Designing Buildings at 09:49, 19 March 2019

2019-03-19T09:49:53Z

← Older revision		Revision as of 09:49, 19 March 2019
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	--[[User:CIOB\|CIOB]]		--[[User:CIOB\|CIOB]]

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Acceleration of construction works.		* Acceleration of construction works.
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	* Key performance indicators.		* Key performance indicators.
	* Line of balance (LOB).		* Line of balance (LOB).
		+	* Logic links.
	* Logistics management.		* Logistics management.
	* Milestones.		* Milestones.
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	* Time-location chart.		* Time-location chart.
	* Time management of construction projects.		* Time management of construction projects.
−	* Topping out.

−	=== External references ===	+	= External references =

	* [https://www.projectcubicle.com/total-float-versus-free-float-scheduling/ Total Float vs Free Float in Scheduling]		* [https://www.projectcubicle.com/total-float-versus-free-float-scheduling/ Total Float vs Free Float in Scheduling]

	[[Category:Construction_management]]		[[Category:Construction_management]]

84.51.32.194 at 15:23, 12 October 2018

2018-10-12T15:23:26Z

← Older revision		Revision as of 15:23, 12 October 2018
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	* Time management of construction projects.		* Time management of construction projects.
	* Topping out.		* Topping out.
		+
		+	=== External references ===
		+
		+	* [https://www.projectcubicle.com/total-float-versus-free-float-scheduling/ Total Float vs Free Float in Scheduling]

	[[Category:Construction_management]]		[[Category:Construction_management]]

Editor at 13:03, 20 March 2018

2018-03-20T13:03:09Z

← Older revision		Revision as of 13:03, 20 March 2018
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	* Activity schedule.		* Activity schedule.
	* CDM planning period.		* CDM planning period.
		+	* Construction inventory management.
	* Construction logistics manager.		* Construction logistics manager.
	* Contractor's master programme.		* Contractor's master programme.

Editor at 15:12, 16 March 2018

2018-03-16T15:12:31Z

← Older revision		Revision as of 15:12, 16 March 2018
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	* Logistics management.		* Logistics management.
	* Milestones.		* Milestones.
		+	* Phased construction works.
	* Precedence diagram method.		* Precedence diagram method.
	* Pre-construction information.		* Pre-construction information.

Editor at 11:58, 1 November 2017

2017-11-01T11:58:08Z

← Older revision		Revision as of 11:58, 1 November 2017
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	The critical path is determined by all the events were the total float is zero. As a result, for the activities which comprise the critical path, the earliest and the latest possible dates for the task coincide, both when starting and concluding each activity. The critical activities define the set of tasks which have to be carried out without delay. Any modification in their duration results in an alteration to the critical path and, as a result in the project’s duration.		The critical path is determined by all the events were the total float is zero. As a result, for the activities which comprise the critical path, the earliest and the latest possible dates for the task coincide, both when starting and concluding each activity. The critical activities define the set of tasks which have to be carried out without delay. Any modification in their duration results in an alteration to the critical path and, as a result in the project’s duration.

−	The duration of an activity can be reduced by adding additional resources, but this will also increase its cost. The “normal” duration of a task is that which minimises its cost. However, a schedule based on normal durations may excessively prolong the work, or may result in the contract duration being exceeded. In both cases, the duration of some or all of the activities may be reduced by increasing resources, however, there is a minimum possible execution time, even where infinite resources are available. To properly adjust ~~durations~~, therefore, the time-cost relationship must be known for each activity.	+	The duration of an activity can be reduced by adding additional resources, but this will also increase its cost. The “normal” duration of a task is that which minimises its cost. However, a schedule based on normal durations may excessively prolong the work, or may result in the contract duration being exceeded.
		+
		+	In both cases, the duration of some or all of the activities may be reduced by increasing resources, however, there is a minimum possible execution time, even where infinite resources are available. To properly adjust duration, therefore, the time-cost relationship must be known for each activity.

	Properly scheduling the available resources is crucial in ensuring that the project is finished within the established timeframe and budget. A load diagram is a useful graphic representation of resources over time, allowing assessment of trends.		Properly scheduling the available resources is crucial in ensuring that the project is finished within the established timeframe and budget. A load diagram is a useful graphic representation of resources over time, allowing assessment of trends.
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	Heuristic methods such as the Burgess-Killebrew method for levelling and the Wiest-Levy method for resource allocation are commonly used and can provide good solutions relatively quickly.		Heuristic methods such as the Burgess-Killebrew method for levelling and the Wiest-Levy method for resource allocation are commonly used and can provide good solutions relatively quickly.

−	The Burgess-Killebrew algorithm is one of the pioneer algorithms in this field; it is also considered one of the most efficient. The resource load diagram looks for non-critical activities which have the most advanced early completion date. This activity delays its completion by units of time until the float runs out. The earliest completion date for the activity is the one that minimises the sum of squares of resource usage. This is repeated with all the non-critical tasks, with priority given to those activities with greater float, where the most advanced early completion date for the two tasks coincides. Once completed, a new cycle of repetitions begins until it is impossible to reduce the sum of squares any further.	+	The Burgess-Killebrew algorithm is one of the pioneer algorithms in this field; it is also considered one of the most efficient. The resource load diagram looks for non-critical activities which have the most advanced early completion date. This activity delays its completion by units of time until the float runs out. The earliest completion date for the activity is the one that minimises the sum of squares of resource usage.
		+
		+	This is repeated with all the non-critical tasks, with priority given to those activities with greater float, where the most advanced early completion date for the two tasks coincides. Once completed, a new cycle of repetitions begins until it is impossible to reduce the sum of squares any further.

	The Wiest-Levy method is based on the scheduling of activities which can be carried out using the resources available. When the load is greater than the available resource, the activity will have to be delayed; amongst the most non-critical activities, the one that solves the problem with the least delay is chosen. If there are two activities with the same conditions, the one with the greatest float is delayed first, meaning that critical activities are only delayed when there is no other option.		The Wiest-Levy method is based on the scheduling of activities which can be carried out using the resources available. When the load is greater than the available resource, the activity will have to be delayed; amongst the most non-critical activities, the one that solves the problem with the least delay is chosen. If there are two activities with the same conditions, the one with the greatest float is delayed first, meaning that critical activities are only delayed when there is no other option.
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	* Fast-track construction.		* Fast-track construction.
	* Gantt chart.		* Gantt chart.
		+	* How progress is agreed in construction.
	* How to manage construction plant.		* How to manage construction plant.
	* Information release schedules.		* Information release schedules.