How to Create a Decision Logic Based on Heuristics

We would probably also test out decision trees, random forests, XGBoosts, light GBM. Logistic regression, Michael and I could probably get that done in two hours. And it's because each of us have done that hundreds of times in our careers of building models like that. But once you do that and you get to the first thing that Michael said, the group buy, can we create our own decision logic based on heuristics? That's likely going to take three months to four months of R&D.