Top-down strategy - Revision history

Iain at 13:11, 14 September 2022

2022-09-14T13:11:39Z

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	====Programme====		====Programme====
	~~[https://eit.engineers.scot/index.php?title=System_Planning#Project_Programme~~ A programme of work]) should be established that defines the tasks and time frame. It should include scheduled reviews of progress and performance.		A programme of work should be established that defines the tasks and time frame. It should include scheduled reviews of progress and performance.

	====Reviews====		====Reviews====

Iain at 20:40, 3 April 2022

2022-04-03T20:40:47Z

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			<div style = "width:1000px">
	The basic, top-down, strategy is to propose a possible solution and assess whether it will be satisfactory - or more generally:to propose a set of solutions and identify the most appropriate one to use.		The basic, top-down, strategy is to propose a possible solution and assess whether it will be satisfactory - or more generally:to propose a set of solutions and identify the most appropriate one to use.
	===Explicit use of the top-down strategy===		===Explicit use of the top-down strategy===
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	===Production===		===Production===
	At the production phase the chosen option is fully developed.		At the production phase the chosen option is fully developed.
			</div>

Iain at 20:40, 3 April 2022

2022-04-03T20:40:16Z

← Older revision		Revision as of 21:40, 3 April 2022
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			The basic, top-down, strategy is to propose a possible solution and assess whether it will be satisfactory - or more generally:to propose a set of solutions and identify the most appropriate one to use.
	~~<div style = "width:1000px">~~

	~~In real world problems, the dominant situation is uncertain, i.e. it is likely that there is no solution that will fully satisfy the requirements.~~

	The basic, top-down, strategy is: propose a possible solution and assess whether it will be satisfactory - or more generally: ~~identify~~ a set of solutions and ~~find~~ the most appropriate one to use.

	===Explicit use of the top-down strategy===		===Explicit use of the top-down strategy===
	[[File:Top-down.png~~\|left~~\|thumb\|Figure 1 Stages in the top-down strategy]]		[[File:Top-down.png\|thumb\|Figure 1 Stages in the top-down strategy]]
	It is normally used tacitly i.e.not based on a formal process. However, when working with complex uncertainty and especially where the outcome may affect others, in order to control the [[risk]], it is necessary to be explicit about the actions that you take i.e. a formal approach must be used.		It is normally used tacitly i.e.not based on a formal process. However, when working with complex uncertainty and especially where the outcome may affect others, in order to control the [[risk]], it is necessary to be explicit about the actions that you take i.e. a formal approach must be used.

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	===Production===		===Production===
	At the production phase the chosen option is fully developed.		At the production phase the chosen option is fully developed.
	~~</div>~~

Iain at 20:35, 3 April 2022

2022-04-03T20:35:24Z

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	~~{\| class="wikitable"~~ style="~~margin-left: auto; margin-right: 0px; background-color:#DEF6FE;~~ width:~~200px; vertical-align:top; text-align:left; float:right; margin-left: 10px;~~"		<div style = "width:1000px">
	~~!References~~
	\|-
	~~\|'''Internal link'''~~
	~~[[Structural design processes\|Use of top -down strategy in Structural Engineering]]~~
	\|}

	In real world problems, the dominant situation is uncertain, i.e. it is likely that there is no solution that will fully satisfy the requirements.		In real world problems, the dominant situation is uncertain, i.e. it is likely that there is no solution that will fully satisfy the requirements.
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	===Production===		===Production===
	At the production phase the chosen option is fully developed.		At the production phase the chosen option is fully developed.
			</div>

Iain at 23:15, 3 March 2022

2022-03-03T23:15:19Z

← Older revision		Revision as of 00:15, 4 March 2022
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	\|}		\|}

	In real world problems, the dominant situation is ~~non-determinate~~ i.e. it is likely that there is no solution that will fully satisfy the requirements.		In real world problems, the dominant situation is uncertain, i.e. it is likely that there is no solution that will fully satisfy the requirements.

	The basic, top-down, strategy is: propose a possible solution and assess whether it will be satisfactory - or more generally: identify a set of solutions and find the most appropriate one to use. ~~This is the only feasible strategy for non-determinate contexts and may also be needed when the situation is determinate.~~		The basic, top-down, strategy is: propose a possible solution and assess whether it will be satisfactory - or more generally: identify a set of solutions and find the most appropriate one to use.

	For examples of non-determinate and deteminate contexts see: ''[https://www.engineers.scot/office/resources/publications/to-engineer.pdf To Engineer]'' (page 5) and ''[https://www.engineers.scot/office/resources/publications/discipline-ct.pdf The discipline of critical thinking]'' (page 2).
	===Explicit use of the top-down strategy===		===Explicit use of the top-down strategy===
	[[File:Top-down.png\|left\|thumb\|Figure 1 Stages in the top-down strategy]]		[[File:Top-down.png\|left\|thumb\|Figure 1 Stages in the top-down strategy]]
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	====Test proposals ====		====Test proposals ====
	Weaknesses in proposals need to be actively identified and addressed.		Weaknesses in proposals need to be actively identified and addressed.

	A test proposals principle is: "Only accept proposals that have been thoroughly tested:		A test proposals principle is: "Only accept proposals that have been thoroughly tested:
	*taking account of all requirements, both objectives and constraints, addressing the complexity		*taking account of all requirements, both objectives and constraints, addressing the complexity
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	*using reliable evidence and logic to the limits of their potential"		*using reliable evidence and logic to the limits of their potential"

	This is probably the most important principle in ~~engineered processes~~. It may be that it is not possible to satisfy all the requirements or that all risks can be eliminated~~. Also it might not be possible to formulate alternative proposals~~. But if a less than satisfactory proposal has to be accepted, one should go forward with open eyes about the potential consequences of its adoption.		This is probably the most important principle in system planning. It may be that it is not possible to satisfy all the requirements or that all risks can be eliminated. But if a less than satisfactory proposal has to be accepted, one should go forward with open eyes about the potential consequences of its adoption.

	====Option assessment ====		====Option assessment ====


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Iain at 12:04, 22 November 2021

2021-11-22T12:04:46Z

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	For examples of non-determinate and deteminate contexts see: ''[https://www.engineers.scot/office/resources/publications/to-engineer.pdf To Engineer]'' (page 5) and ''[https://www.engineers.scot/office/resources/publications/discipline-ct.pdf The discipline of critical thinking]'' (page 2).		For examples of non-determinate and deteminate contexts see: ''[https://www.engineers.scot/office/resources/publications/to-engineer.pdf To Engineer]'' (page 5) and ''[https://www.engineers.scot/office/resources/publications/discipline-ct.pdf The discipline of critical thinking]'' (page 2).


	===Explicit use of the top-down strategy===		===Explicit use of the top-down strategy===
	[[File:Top-down.png\|left\|thumb\|Figure 1 Stages in the top-down strategy]]		[[File:Top-down.png\|left\|thumb\|Figure 1 Stages in the top-down strategy]]

Iain at 12:04, 22 November 2021

2021-11-22T12:04:15Z

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	!~~Reference~~		!References
	\|-		\|-
	\|'''Internal ~~links~~'''		\|'''Internal link'''
	[[Structural design processes\|Use of top -down strategy in Structural Engineering]]~~page~~		[[Structural design processes\|Use of top -down strategy in Structural Engineering]]
	\|}		\|}

Iain at 12:00, 22 November 2021

2021-11-22T12:00:20Z

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	!~~References~~		!Reference
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	\|'''Internal links'''		\|'''Internal links'''

Iain at 11:56, 22 November 2021

2021-11-22T11:56:46Z

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	\|-		\|-
	\|'''Internal links'''		\|'''Internal links'''
	[[Structural design processes\|Use of top -down strategy in Structural Engineering]] page		[[Structural design processes\|Use of top -down strategy in Structural Engineering]]page
	\|-		\|}

	In real world problems, the dominant situation is non-determinate i.e. it is likely that there is no solution that will fully satisfy the requirements.		In real world problems, the dominant situation is non-determinate i.e. it is likely that there is no solution that will fully satisfy the requirements.

Iain at 10:07, 22 November 2021

2021-11-22T10:07:31Z

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			{\| class="wikitable" style="margin-left: auto; margin-right: 0px; background-color:#DEF6FE; width:200px; vertical-align:top; text-align:left; float:right; margin-left: 10px;"
			!References
			\|-
			\|'''Internal links'''
			[[Structural design processes\|Use of top -down strategy in Structural Engineering]] page
			\|-

	In real world problems, the dominant situation is non-determinate i.e. it is likely that there is no solution that will fully satisfy the requirements.		In real world problems, the dominant situation is non-determinate i.e. it is likely that there is no solution that will fully satisfy the requirements.