Concurrent Operating Times - Crow Extended Example - Revision history

Lisa Hacker at 20:53, 18 September 2023

2023-09-18T20:53:21Z

← Older revision		Revision as of 20:53, 18 September 2023
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	<noinclude>{{Banner RGA Examples}}		<noinclude>{{Banner RGA Examples}}
	''This example appears in the [~~[Crow_Extended\|~~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 17:24, 30 May 2014

2014-05-30T17:24:28Z

← Older revision		Revision as of 17:24, 30 May 2014
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	<li>There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.		<li>There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.

	[[Image:rga9.30.png~~\|thumb~~\|center\|450px]]		[[Image:rga9.30.png\|center\|450px]]

	</li>		</li>
	<li>To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.		<li>To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.

	[[Image:rga9.31.png~~\|thumb~~\|center\|450px]]		[[Image:rga9.31.png\|center\|450px]]

	Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.		Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.

David J. Groebel at 17:24, 30 May 2014

2014-05-30T17:24:14Z

← Older revision		Revision as of 17:24, 30 May 2014
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	<li>The next figure shows the estimated Crow Extended parameters.		<li>The next figure shows the estimated Crow Extended parameters.

	[[Image:rga9.29.png~~\|thumb~~\|center\|~~400px\|Entered data and the estimated Crow Extended parameters.~~]]		[[Image:rga9.29.png\|center\|600px]]

	</li>		</li>
	<li>There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.		<li>There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.

	[[Image:rga9.30.png\|thumb\|center\|~~400px\|Calculate the projected MTBF.~~]]		[[Image:rga9.30.png\|thumb\|center\|450px]]

	</li>		</li>
	<li>To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.		<li>To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.

	[[Image:rga9.31.png\|thumb\|center\|~~400px\|Individual Mode Failure Intensity chart.~~]]		[[Image:rga9.31.png\|thumb\|center\|450px]]

	Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.		Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.

	[[Image:rga9.32.png~~\|thumb~~\|center\|~~400px\|Calculate the projected MTBF based on the change to the management strategy.~~]]		[[Image:rga9.32.png\|center\|450px]]
	</li>		</li>
	</ol>		</ol>

Chris Kahn at 23:33, 23 April 2014

2014-04-23T23:33:41Z

← Older revision		Revision as of 23:33, 23 April 2014
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	Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables shown next display the data set and the associated effectiveness factors for the unique BD modes.		Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables shown next display the data set and the associated effectiveness factors for the unique BD modes.

	<div style="width: ~~500px~~; float: left;">		<div style="margin-right: auto; margin-left:auto; width: 570px;">
			<div style="float: left;">
	{\|border="1" align="center" style="border-collapse: collapse;" cellpadding="5" cellspacing="5"		{\|border="1" align="center" style="border-collapse: collapse;" cellpadding="5" cellspacing="5"
	\|-		\|-
	\|colspan="4" style="text-align:center"\|'''Multiple Systems (Concurrent Operating Times) ~~data~~'''		\|colspan="4" style="text-align:center"\|'''Multiple Systems (Concurrent Operating Times) Data'''
	\|-		\|-
	!		!
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	</div>		</div>
	~~<div style="width: 200px; float: left;">~~

			<div style="float: right;">
	{\|border="1" align="center" style="border-collapse: collapse;" cellpadding="5" cellspacing="5"		{\|border="1" align="center" style="border-collapse: collapse;" cellpadding="5" cellspacing="5"
	\|-		\|-
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	\|16\|\| 0.75		\|16\|\| 0.75
	\|}		\|}
			</div>
	</div>		</div>
	<p style="clear: both;"></p>		<p style="clear: both;"></p>

David J. Groebel at 00:33, 23 April 2014

2014-04-23T00:33:38Z

← Older revision		Revision as of 00:33, 23 April 2014
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	#Based on the current management strategy what is the projected MTBF?		#Based on the current management strategy what is the projected MTBF?
	#If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.		#If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.


	'''Solution'''		'''Solution'''

David J. Groebel at 23:18, 22 April 2014

2014-04-22T23:18:57Z

← Older revision		Revision as of 23:18, 22 April 2014
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	<noinclude>{{Banner RGA Examples}}		<noinclude>{{Banner RGA Examples}}
	''This example appears in the [[Crow_Extended\|Reliability Growth and Repairable System Analysis Reference ~~book~~]]''.		''This example appears in the [[Crow_Extended\|Reliability Growth and Repairable System Analysis Reference]]''.
	</noinclude>		</noinclude>

Chris Kahn at 20:52, 6 February 2014

2014-02-06T20:52:46Z

← Older revision		Revision as of 20:52, 6 February 2014
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	</noinclude>		</noinclude>

	Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables ~~below shows~~ the data set and the associated effectiveness factors for the unique ~~BD modes. The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:~~		Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables shown next display the data set and the associated effectiveness factors for the unique BD modes.

	~~#Estimate the parameters of the Crow Extended model.~~
	~~#Based on the current management strategy what is the projected MTBF?~~
	#If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.

	<div style="width: 500px; float: left;">		<div style="width: 500px; float: left;">
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	\|End Time\|\|541\|\| 454\|\| 436		\|End Time\|\|541\|\| 454\|\| 436
	\|-		\|-
	\|Times-to-Failure\|\| 83 BD37\|\| 26 BD25\|\| 23 BD30		\|Times-to-Failure\|\| 83 BD37 \|\| 26 BD25\|\| 23 BD30
	\|-		\|-
	\| \|\|83 BD43\|\| 26 BD43\|\| 46 BD49		\| \|\|83 BD43 \|\| 26 BD43 \|\| 46 BD49
	\|-		\|-
	\| \|\|83 BD46\|\| 57 BD37\|\| 127 BD47		\| \|\|83 BD46 \|\| 57 BD37 \|\| 127 BD47
			\|-
			\| \|\|169 A45 \|\| 64 BD19 \|\| 166 A2
	\|-		\|-
	\| \|\|169 A45\|\| ~~64 BD19\|\| 166 A2~~		\| \|\|213 A18 \|\| 169 A45 \|\| 169 BD23
	\|-		\|-
	\| \|\|~~213 A18~~\|\| ~~169 A45~~\|\| ~~169 BD23~~		\| \|\|299 A42 \|\| 213 A32 \|\| 213 BD7
	\|-		\|-
	~~\| \|\|299 A42\|\| 213 A32\|\| 213 BD7~~		\| \|\|375 A1 \|\| 231 BD8 \|\| 213 BD29
	\|-
	\| \|\|375 A1\|\| 231 BD8\|\| 213 BD29
	\|-		\|-
	\| \|\|431 BD16\|\| 231 BD25\|\| 255 BD26		\| \|\|431 BD16\|\| 231 BD25\|\| 255 BD26
	\|-		\|-
	\| \|\| \|\|231 BD27\|\| 369 A33		\| \|\| \|\|231 BD27 \|\| 369 A33
	\|-		\|-
	\| \|\| \|\|231 A28\|\| 374 BD29		\| \|\| \|\|231 A28 \|\| 374 BD29
	\|-		\|-
	\| \|\| \|\|304 BD24\|\| 380 BD22		\| \|\| \|\|304 BD24 \|\| 380 BD22
	\|-		\|-
	\| \|\| \|\|383 BD40\|\| 415 BD7		\| \|\| \|\|383 BD40 \|\| 415 BD7
	\|}		\|}

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	</div>		</div>
	<p style="clear: both;"></p>		<p style="clear: both;"></p>

			The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:

			#Estimate the parameters of the Crow Extended model.
			#Based on the current management strategy what is the projected MTBF?
			#If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.


	'''Solution'''		'''Solution'''

Chris Kahn at 20:48, 6 February 2014

2014-02-06T20:48:48Z

← Older revision		Revision as of 20:48, 6 February 2014
Line 5:		Line 5:
	Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables below shows the data set and the associated effectiveness factors for the unique BD modes. The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:		Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables below shows the data set and the associated effectiveness factors for the unique BD modes. The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:

	1) Estimate the parameters of the Crow Extended model.		#Estimate the parameters of the Crow Extended model.
			#Based on the current management strategy what is the projected MTBF?
	2) Based on the current management strategy what is the projected MTBF?		#If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.

	3) If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.

	<div style="width: 500px; float: left;">		<div style="width: 500px; float: left;">
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	'''Solution'''		'''Solution'''
	<br>		<ol>
	1) The next figure shows the estimated Crow Extended parameters.		<li>The next figure shows the estimated Crow Extended parameters.

	[[Image:rga9.29.png\|thumb\|center\|400px\|Entered data and the estimated Crow Extended parameters.]]		[[Image:rga9.29.png\|thumb\|center\|400px\|Entered data and the estimated Crow Extended parameters.]]

	2) There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.		</li>
			<li>There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.

	[[Image:rga9.30.png\|thumb\|center\|400px\|Calculate the projected MTBF.]]		[[Image:rga9.30.png\|thumb\|center\|400px\|Calculate the projected MTBF.]]

	3) To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.		</li>
			<li>To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.

	[[Image:rga9.31.png\|thumb\|center\|400px\|Individual Mode Failure Intensity chart.]]		[[Image:rga9.31.png\|thumb\|center\|400px\|Individual Mode Failure Intensity chart.]]
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	[[Image:rga9.32.png\|thumb\|center\|400px\|Calculate the projected MTBF based on the change to the management strategy.]]		[[Image:rga9.32.png\|thumb\|center\|400px\|Calculate the projected MTBF based on the change to the management strategy.]]
			</li>
			</ol>

David J. Groebel at 18:21, 27 January 2014

2014-01-27T18:21:25Z

← Older revision		Revision as of 18:21, 27 January 2014
Line 103:		Line 103:
	1) The next figure shows the estimated Crow Extended parameters.		1) The next figure shows the estimated Crow Extended parameters.

	[[Image:rga9.29.png\|thumb\|center\|~~300px~~\|Entered data and the estimated Crow Extended parameters.]]		[[Image:rga9.29.png\|thumb\|center\|400px\|Entered data and the estimated Crow Extended parameters.]]

	2) There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.		2) There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.

	[[Image:rga9.30.png\|thumb\|center\|~~300px~~\|Calculate the projected MTBF.]]		[[Image:rga9.30.png\|thumb\|center\|400px\|Calculate the projected MTBF.]]

	3) To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.		3) To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.

	[[Image:rga9.31.png\|thumb\|center\|~~300px~~\|Individual Mode Failure Intensity chart.]]		[[Image:rga9.31.png\|thumb\|center\|400px\|Individual Mode Failure Intensity chart.]]

	Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.		Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.

	[[Image:rga9.32.png\|thumb\|center\|~~300px~~\|Calculate the projected MTBF based on the change to the management strategy.]]		[[Image:rga9.32.png\|thumb\|center\|400px\|Calculate the projected MTBF based on the change to the management strategy.]]

David J. Groebel at 18:10, 27 January 2014

2014-01-27T18:10:58Z

← Older revision		Revision as of 18:10, 27 January 2014
Line 5:		Line 5:
	Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables below shows the data set and the associated effectiveness factors for the unique BD modes. The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:		Three systems were subjected to a reliability growth test to evaluate the prototype of a new product. Based on a failure analysis on the results of the test, the proposed management strategy is to delay corrective actions until after the test. The tables below shows the data set and the associated effectiveness factors for the unique BD modes. The prototype is required to meet a projected MTBF goal of 55 hours. Do the following:

	:1) Estimate the parameters of the Crow Extended model.		1) Estimate the parameters of the Crow Extended model.
	:2) Based on the current management strategy what is the projected MTBF?
	:3) If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.		2) Based on the current management strategy what is the projected MTBF?

			3) If the projected MTBF goal is not met, alter the current management strategy to meet this requirement with as little adjustment as possible and without changing the EFs of the existing BD modes. Assume an EF = 0.7 for any newly assigned BD modes.

	<div style="width: 500px; float: left;">		<div style="width: 500px; float: left;">
Line 96:		Line 98:
	</div>		</div>
	<p style="clear: both;"></p>		<p style="clear: both;"></p>


	'''Solution'''		'''Solution'''
	<br>		<br>
	:1) The next figure shows the estimated Crow Extended parameters.		1) The next figure shows the estimated Crow Extended parameters.

	[[Image:rga9.29.png\|thumb\|center\|300px\|Entered data and the estimated Crow Extended parameters.]]		[[Image:rga9.29.png\|thumb\|center\|300px\|Entered data and the estimated Crow Extended parameters.]]

	:2) There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.		2) There are a couple of ways to calculate the projected MTBF, but the easiest is via the Quick Calculation Pad (QCP). The following result shows that the projected MTBF is estimated to be 53.9390 hours, which is below the goal of 55 hours.

	[[Image:rga9.30.png\|thumb\|center\|300px\|Calculate the projected MTBF.]]		[[Image:rga9.30.png\|thumb\|center\|300px\|Calculate the projected MTBF.]]

	:3) To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.		3) To reach our goal, or to see if we can even get there, the management strategy must be changed. The effectiveness factors for the existing BD modes cannot be changed; however, it is possible to change an A mode to a BD mode, but which A mode(s) should be changed? To answer this question, create an Individual Mode Failure Intensity plot with just the A modes displayed, as shown next. As you can see from the plot, failure mode A45 has the highest failure intensity. Therefore, among the A modes, this particular failure mode has the greatest negative effect on the system MTBF.

	[[Image:rga9.31.png\|thumb\|center\|300px\|Individual Mode Failure Intensity chart.]]		[[Image:rga9.31.png\|thumb\|center\|300px\|Individual Mode Failure Intensity chart.]]

			Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.
	:Change A45 to BD45. Be sure to change all instances of A45 to a BD mode. Enter an effectiveness factor of 0.7 for BD45, and then recalculate the parameters of the Crow Extended model. Now go back to the QCP to calculate the projected MTBF, as shown below. The projected MTBF is now estimated to be 55.5903 hours. Based on the change in the management strategy, the projected MTBF goal is now expected to be met.

	[[Image:rga9.32.png\|thumb\|center\|300px\|Calculate the projected MTBF based on the change to the management strategy.]]		[[Image:rga9.32.png\|thumb\|center\|300px\|Calculate the projected MTBF based on the change to the management strategy.]]