1 INTRODUCTION  
2 SDSS-IV EBOSS AND DR16 LRG SAMPLE  
3 MODELING THE GALAXY-HALO CONNECTION: THEORETICAL BACKGROUND  
4 MODELING THE GALAXY-HALO CONNECTION: TOOLS AND METHODOLOGY  
5 ANALYSIS: METHODOLOGY  
6 THE GALAXY MOCK CHALLENGE  
7 SYSTEMATIC ERROR BUDGET  
8 CONCLUSIONS AND OUTLOOK  