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| ====Growth Potential Design Margin====
| | #REDIRECT [[Reliability_Growth_Planning#Growth_Potential_Design_Margin]] |
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| 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.
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| 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> :
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| ::<math>{{M}_{GP}}=GPDM\cdot {{M}_{G}}</math>
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| or in terms of failure intensity:
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| ::<math>{{\lambda }_{GP}}=\frac{{{\lambda }_{G}}}{GPDM}</math>
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