Hey, I'm Abhijit Singh.
An operator exploring the math behind everyday business dilemmas.

I spend my time learning and working on decision science, stochastic systems, and operations research. Over the years, I noticed how often we find ourselves debating dilemmas in meetings that mathematicians and engineers mapped out decades ago. When you write down the underlying relationships, the trade-offs become a lot clearer.

DATUM started as a personal reference notebook and projection of how I think through these problems — 100 practical blueprints across demand, inventory buffers, plant bottlenecks, and pricing, paired with small interactive simulators to explore the boundaries.