3. Collision-Based Hybrid Method# 3.1. The Collision-Based Hybrid Method 3.1.1. Introduction 3.1.2. The Collision-Based Hybrid Formulation 3.1.2.1. The Continuous Collided-Uncollided Split 3.1.2.2. The Hybrid Multigroup, Discrete Ordinates Equations 3.1.2.3. Metrics for the Performance of the Hybrid Method 3.2. One Dimensional Collision-Based Hybrid Method 3.2.1. General Process in ANTS 3.2.2. Additional Parameters for ANTS