Failure Times - Duane Example - Revision history

Lisa Hacker at 21:16, 18 September 2023

2023-09-18T21:16:58Z

← Older revision		Revision as of 21:16, 18 September 2023
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	<noinclude>{{Banner RGA Examples}}		<noinclude>{{Banner RGA Examples}}
	''This example appears in the [~~[Duane Model\|~~Reliability ~~Growth and Repairable System Analysis Reference]~~]''.		''This example appears in the [https://help.reliasoft.com/reference/reliability_growth_and_repairable_system_analysis Reliability growth reference]''.
	</noinclude>		</noinclude>

David J. Groebel at 22:18, 2 June 2014

2014-06-02T22:18:35Z

← Older revision		Revision as of 22:18, 2 June 2014
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	<li> The following figure shows the cumulative and instantaneous MTBF curves.		<li> The following figure shows the cumulative and instantaneous MTBF curves.

	[[Image:rga4.12.png~~\|thumb~~\|center\|450px]]</li>		[[Image:rga4.12.png\|center\|450px]]</li>

	<li>The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.		<li>The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.

	[[Image:rga4.13.png~~\|thumb~~\|center\|450px]]</li>		[[Image:rga4.13.png\|center\|450px]]</li>

	<li>The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.		<li>The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.

	[[Image:rga4.14.png~~\|thumb~~\|center\|450px]]</li>		[[Image:rga4.14.png\|center\|450px]]</li>
	</ol>		</ol>

David J. Groebel at 22:16, 2 June 2014

2014-06-02T22:16:43Z

← Older revision		Revision as of 22:16, 2 June 2014
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	<noinclude>{{Banner RGA Examples}}		<noinclude>{{Banner RGA Examples}}
	''This example appears in the [[Duane Model\|Reliability Growth and Repairable System Analysis Reference ~~book~~]]''.		''This example appears in the [[Duane Model\|Reliability Growth and Repairable System Analysis Reference]]''.
	</noinclude>		</noinclude>

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	\|}		\|}

			Do the following:
	#Estimate the Duane parameters.		#Estimate the Duane parameters.
	#Plot the cumulative and instantaneous MTBF curves.		#Plot the cumulative and instantaneous MTBF curves.
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	<li>The next figure shows the data entered into RGA along with the estimated Duane parameters.		<li>The next figure shows the data entered into RGA along with the estimated Duane parameters.

	[[Image:rga4.11.png~~\|thumb~~\|center\|~~400px\|Entered data and the estimated Duane parameters.~~]]</li>		[[Image:rga4.11.png\|center\|600px]]</li>

	<li> The following figure shows the cumulative and instantaneous MTBF curves.		<li> The following figure shows the cumulative and instantaneous MTBF curves.

	[[Image:rga4.12.png\|thumb\|center\|~~400px\|The cumulative and instantaneous MTBF curves.~~]]</li>		[[Image:rga4.12.png\|thumb\|center\|450px]]</li>

	<li>The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.		<li>The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.

	[[Image:rga4.13.png\|thumb\|center\|~~400px\|Required test time for an instantaneous MTBF of 500 hours.~~]]</li>		[[Image:rga4.13.png\|thumb\|center\|450px]]</li>

	<li>The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.		<li>The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.

	[[Image:rga4.14.png\|thumb\|center\|~~400px\|Required test time for a cumulative MTBF of 500 hours.~~]]</li>		[[Image:rga4.14.png\|thumb\|center\|450px]]</li>
	</ol>		</ol>

Kate Racaza at 17:23, 4 February 2014

2014-02-04T17:23:23Z

← Older revision		Revision as of 17:23, 4 February 2014
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	#Estimate the Duane parameters.		#Estimate the Duane parameters.
	#Plot the cumulative and instantaneous MTBF curves.		#Plot the cumulative and instantaneous MTBF curves.
	#How many cumulative test and development hours are required to meet an ''instantaneous'' MTBF goal #of 500 hours?		#How many cumulative test and development hours are required to meet an ''instantaneous'' MTBF goal of 500 hours?
	#How many cumulative test and development hours are required to meet a ''cumulative'' MTBF goal of 500 hours?		#How many cumulative test and development hours are required to meet a ''cumulative'' MTBF goal of 500 hours?

Chris Kahn at 22:30, 31 January 2014

2014-01-31T22:30:25Z

← Older revision		Revision as of 22:30, 31 January 2014
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	'''Solution'''		'''Solution'''
			<ol>
			<li>The next figure shows the data entered into RGA along with the estimated Duane parameters.

	1. ~~The next figure shows the~~ data ~~entered into RGA along with~~ the estimated Duane parameters.		[[Image:rga4.11.png\|thumb\|center\|400px\|Entered data and the estimated Duane parameters.]]</li>

	~~[[Image:rga4.11.png\|thumb\|center\|400px\|Entered data~~ and ~~the estimated Duane parameters~~.]]		<li> The following figure shows the cumulative and instantaneous MTBF curves.

	2. The ~~following figure shows the~~ cumulative and instantaneous MTBF curves.		[[Image:rga4.12.png\|thumb\|center\|400px\|The cumulative and instantaneous MTBF curves.]]</li>

	~~[[Image:rga4.12.png\|thumb\|center\|400px\|~~The cumulative and instantaneous MTBF ~~curves~~.]]		<li>The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.

	3. ~~The next figure shows the cumulative~~ test ~~and development hours needed~~ for an instantaneous MTBF ~~goal~~ of 500 hours.		[[Image:rga4.13.png\|thumb\|center\|400px\|Required test time for an instantaneous MTBF of 500 hours.]]</li>

	~~[[Image:rga4.13.png\|thumb\|center\|400px\|Required~~ test ~~time~~ for ~~an instantaneous~~ MTBF of 500 hours.]]		<li>The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.

	~~4. The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.~~		[[Image:rga4.14.png\|thumb\|center\|400px\|Required test time for a cumulative MTBF of 500 hours.]]</li>
			</ol>
	[[Image:rga4.14.png\|thumb\|center\|400px\|Required test time for a cumulative MTBF of 500 hours.]]

David J. Groebel at 22:55, 30 January 2014

2014-01-30T22:55:16Z

← Older revision		Revision as of 22:55, 30 January 2014
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	[[Image:rga4.13.png\|thumb\|center\|400px\|Required test time for an instantaneous MTBF of 500 hours.]]		[[Image:rga4.13.png\|thumb\|center\|400px\|Required test time for an instantaneous MTBF of 500 hours.]]


	4. The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.		4. The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.

	[[Image:rga4.14.png\|thumb\|center\|400px\|Required test time for a cumulative MTBF of 500 hours.]]		[[Image:rga4.14.png\|thumb\|center\|400px\|Required test time for a cumulative MTBF of 500 hours.]]

Kate Racaza: Created page with '{{Banner RGA Examples}} ''This example appears in the Reliability Growth and Repairable System Analysis Reference book''. A prototype of …'

2013-11-21T22:19:46Z

Created page with '<noinclude>{{Banner RGA Examples}} ''This example appears in the Reliability Growth and Repairable System Analysis Reference book''. </noinclude> A prototype of …'

New page

<noinclude>{{Banner RGA Examples}}
''This example appears in the [[Duane Model|Reliability Growth and Repairable System Analysis Reference book]]''.
</noinclude>

A prototype of a system was tested with design changes incorporated during the test. A total of 12 failures occurred. The data set is given in the following table.

{|border="1" align="center" style="border-collapse: collapse;" cellpadding="5" cellspacing="5"
|+'''Developmental Test Data'''
!Failure Number
!Cumulative Test Time(hours)
|-
|1 ||80
|-
|2 ||175
|-
|3 ||265
|-
|4 ||400
|-
|5 ||590
|-
|6|| 1100
|-
|7|| 1650
|-
|8|| 2010
|-
|9|| 2400
|-
|10|| 3380
|-
|11|| 5100
|-
|12|| 6400
|}

#Estimate the Duane parameters.
#Plot the cumulative and instantaneous MTBF curves.
#How many cumulative test and development hours are required to meet an ''instantaneous'' MTBF goal #of 500 hours?
#How many cumulative test and development hours are required to meet a ''cumulative'' MTBF goal of 500 hours?

'''Solution'''

1. The next figure shows the data entered into RGA along with the estimated Duane parameters.

[[Image:rga4.11.png|thumb|center|400px|Entered data and the estimated Duane parameters.]]

2. The following figure shows the cumulative and instantaneous MTBF curves.

[[Image:rga4.12.png|thumb|center|400px|The cumulative and instantaneous MTBF curves.]]

3. The next figure shows the cumulative test and development hours needed for an instantaneous MTBF goal of 500 hours.

[[Image:rga4.13.png|thumb|center|400px|Required test time for an instantaneous MTBF of 500 hours.]]

4. The figure below shows the cumulative test and development hours needed for a cumulative MTBF goal of 500 hours.

[[Image:rga4.14.png|thumb|center|400px|Required test time for a cumulative MTBF of 500 hours.]]