This article describes some applications for construction process simulation. Firstly, some processes have been conceptually worked using Cyclone Model (Halpin) and then they were simulated on Software Arena and Spreadsheets for testing in some situations with different adjustments in parameters (mainly number of equipment) associated to unit costs and global cost on alternative scenarios that allows decisions about planning and equipment selection to be made. Two types of cyclone models are presented, metal structures works and earthworks optimization. The simulation process helps to get an overview of many options for construction process and to obtain an optimal scenario.