Different strategies for genetic evaluation and selection of Segureña ewes were compared through simulation. First, weaning weights of lambs in a single flock of 624 ewes and 39 rams were simulated through 30 consecutive lambings, in order to compare the simple breeding value model with the maternal effects model for lamb evaluation. Secondly, weaning weights of lambs and litter sizes of lambings of more than 6,000 ewes, distributed in 20 herds, were simulated during 21 consecutive lambings with the purpose to decide on the optimum number of daughter per sire of breeding values prediction and to asses selection criteria to use for metal production improvement. Differences of the average breed i ng values of first and last generations simulated was the criterion used in all comparison. Evolution of average inbreeding through generations was also considered. Results showed that: 1) The simple breeding value model yields the same genetic progress and the same increase in inbreeding as the maternal effects model. 2) Maximum genetic progress for litter size is obtained when testing each sire with about 40 daughters each. 3) The best selection criterion for meat production improvement in the traditional market of this breed is the predicted breeding value of litter size.