In this work, a numerical stochastic model is presented and utilized to study the dry/sort/re-dry (DSRD) strategy for 116-mm square ,timbers ,by using ,combined conventional,and ,radio frequency ,vacuum ,(RFV) drying ,technologies. The model parameters are calibrated with experimental timber drying data of mixed western hemlock and amabilis fir, and the total percentages of on-grade, over-dried and under-dried timbers are simulated for different conventional and RFV target moisture content situations. The results of the simulated percentages of timbers are presented in 2-D level curves, and the ranges of target that should be used ,in order ,to obtain ,maximum ,on-grade timbers are analyzed.