Abstract: Weak scale supersymmetry has a generic problem of fine-tuning in reproducing the correct scale for electroweak symmetry breaking. The problem is particularly severe in the minimal supersymmetric extension of the standard model (MSSM). We review this problem and carefully discuss the essential ingredients for the solution to this problem. We find that it can be just a problem in the supersymmetry breaking sector and thus we may not need an extention of the MSSM. We discuss a model with mixed moduli-anomaly mediation which satisfies all the ingredient for solving the fine-tuning problem and provides rich phenomenological predictions on low energy experiments.