• Fuzzy Logic
• Materials Requirements Planning
• Uncertainty

The aim of this paperwork is to handle uncertainty in a Material Requirements Planning (MRP) model using Fuzzy Logic. Particularly, the model is applied to dependent demand in which a MRP method is used. The materials planning model is a combination of basic sources of uncertainty that affects the MRP system, namely, demand and supply uncertainty, and a Fuzzy Logic Inference system. The model is used to control the principal parameter to buffer against uncertainties: safety stock. The model performance is tested for historic data and compared with real inventories levels and a MRP reference model.