Template:Growth potential design margin crow extended: Difference between revisions

Latest revision as of 01:44, 27 August 2012

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-====Growth Potential Design Margin====
+#REDIRECT [[Reliability_Growth_Planning#Growth_Potential_Design_Margin]]
-<br>
-The Growth Potential Design Margin ( <math>GPDM</math> ) can be considered as a safety margin when setting target MTBF values for the reliability growth plan. It is common for systems to degrade in terms of reliability when a prototype product is going into full manufacturing due to variation in material, processes, etc. Furthermore, the in-house reliability growth testing usually overestimates the actual product reliability, since the field usage conditions may not be perfectly simulated during growth testing. Typical values for the  <math>GPDM</math>  are around 1.2. Higher values yield less risk for the program, but require a more rigorous reliability growth test plan. Lower values imply higher program risk, with less safety margin.
-During the planning stage, the growth potential MTBF,  <math>{{M}_{GP}},</math>  can be calculated based on the goal MTBF,  <math>{{M}_{G}},</math>  and the growth potential design margin,  <math>GPDM</math> :
-::<math>{{M}_{GP}}=GPDM\cdot {{M}_{G}}</math>
-or in terms of failure intensity:
-::<math>{{\lambda }_{GP}}=\frac{{{\lambda }_{G}}}{GPDM}</math>