Simulation model
Case Reserve Adqeuacy Interpolation on 0, 40%, 70&, 90% and 1.0 of valuationLag/paymentLag
Case reserve adequacy  meanlog sdlog
meanlog 0% -0.10536 sdlog 0% 0.05 Note:  Blue-shaded areas are inputs,
meanlog 40% 0.5 sdlog 40% 0.05   other cells are calculated.
meanlog 70% 0.25 sdlog 70% 0.03
meanlog 90% 0.05 sdlog 90% 0.03
Time 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.95691 1
Interpolated meanlog -0.10536 0.04598 0.19732 0.34866 0.5 0.416667 0.333333 0.25 0.15 0.05 0.021545 0
Interpolated sdlog2 0.05 0.05 0.05 0.05 0.05 0.043333 0.036667 0.03 0.03 0.03 0.012927 0
Lognormal mean and standard deviation of reserve adequacy factor.
Mean 2 0.901126 1.048363 1.219657 1.41894 1.650783 1.518322 1.396551 1.28460336 1.162357 1.051744 1.021864 1
V ariance 2 0.002033 0.002751 0.003724 0.00504 0.006821 0.004333 0.002624 0.00148585 0.001217 0.000996 0.000175 0
Stnd dev 2 0.045084 0.052451 0.061021 0.070991 0.082591 0.065825 0.051224 0.03854677 0.034879 0.031559 0.01321 0
Method 2:  Input sdlog for times 0, 0.4, 0.7, and  0.9.  Then use linear interpolation.
All methods use linear interpolation between 0.9 and 1.0.