Distribution | Mixing proportion | Mixing components | Failure rate | Parameters | |
shape | location | ||||
GLD ( θ,γ,α ) | θθ+γ | gamma ( α,θ ), gamma ( α+1,θ ) | increasing | θ,γ,α | - |
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| bathtub decreasing |
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|
TwPLD ( θ,α ) | θθ+α | exponential ( θ ), gamma ( 2,θ ) | increasing | θ,α | - |
NGLD ( θ,α ) | θθ+1 | gamma ( α,θ ), gamma ( α−1,θ ) | increasing | θ,α | - |
LwLD ( θ,α,β ) | θθ+α | exponential ( θ,β ), gamma ( 2,θ,β ) | increasing | θ,α | β |
NGTwPLD ( θ,α ) | θθ+1 | exponential ( θ ), gamma ( α,θ ) | increasing | θ,α | - |
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| bathtub |
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| decreasing |
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|
LGAD | θ2θ2+η | exponential ( θ,β ) and gamma ( 3,θ,β ) | increasing | θ,η | β |
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| bathtub |
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|
TwPD ( θ,α ) | θ−2αθ−α | gamma ( α,θ ), gamma ( α+1,θ ) | increasing | θ,α | - |
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| bathtub |
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|