SRGM

Equation

Goel-Okumoto

$\mu \left(t\right)=109.46932\left(1-{\text{e}}^{-0.00636t}\right)$

S-shaped

$\mu \left(t\right)=92.79993\left(1-\left(1+0.01911t\right){\text{e}}^{-0.01911t}\right)$

Musa-Okumoto

$\mu \left(\tau \right)=1/0.02134ln\left(\left(0.02134\ast 0.92742t\right)+1\right)$

Song’s model

$\mu \left(t\right)=200.4941{\left(1-\frac{9}{9+\ln \left(\frac{200.4941+{\text{e}}^{0.2669t}}{1+200.4941}\right)}\right)}^{0.2669}$