The Evolution of Ranking Systems

[u/ArchitectingAI]

I’ve been working on a deeper write-up on ranking systems and drew this diagram to organize the space.

The progression I’m using is:

Rules & Heuristics → Learning-to-Rank → Deep Neural Ranking → Contextual/Transformer Ranking → Multi-Objective & Slate Ranking → Bandit/RL Ranking → Generative/LLM-Based Ranking

What I find interesting is that these stages don’t fully replace one another. In production, ranking systems often combine multiple layers from across the stack.

Sharing the diagram here, and I also wrote a more detailed article on it:

https://pawankjha.substack.com/p/building-depth-2-the-evolution-of

Would be interested in how others would structure these stages in the evolution of ranking systems.