Summary

Each approach has its advantages and trade-offs, with the bottom-up being more iterative and flexible, while the top-down offers a more structured and holistic view of the organization’s data.

Examples:

Top Down - Popular big retail stores likely to follow this architecture. As they have build a centralized data warehouse that feeds their stores. Similarly Financial organlizations like Banks may take top-down approach.

Bottom Up - Popular OTT have such models. Initially bring movies, then add their own production and add third party providers.