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Welcome to 8-Chems: Data Science, AI and Software Development, Step by Step

Chemseddine Berbague
Welcome to 8-Chems , a blog where I explain data science, AI, and software development step by step. Imagine opening a tutorial and finding exactly what you wished a colleague had told you: the intuition first, then a small example, then the formula or the code, and finally how it all fits into a real project. That is the kind of post I try to write here. Who writes here I'm Chemseddine Berbague, a data scientist and developer. I earned my Ph.D. in computer science in 2021, working on recommender systems and multi-objective optimization, and I enjoy turning research ideas into things that run in practice: forecasting models, optimization methods, data pipelines, and web applications. This blog is my notebook in public. If a topic took me a while to understand, I write it down in the way I would have liked to read it. What you will find The posts fall into four themes. Pick the one that matches what you are looking for. Data science in retail and forecasting A series about ...
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From Forecasting to Decision Optimization

Chemseddine Berbague
From Forecasting to Decision Optimization Building an end-to-end retail data science system: business KPIs, demand forecasting, mathematical optimization, supplier selection, decision policies and production deployment, told as one story. A practical, illustrated guide · about 40 minutes of reading · all figures in the examples are illustrative A forecast is only a sentence about the future. A business needs a verb. This guide follows one retailer, and one data scientist, from the first vague complaint (“we keep running out of things, and also throwing things away”) to a deployed system that predicts, decides, executes, measures and improves. What we will cover Business understanding KPI design Data acquisition and preparation Demand forecasting Designing a decision policy Inventory optimization Supplier selection Optimization algorithms How the pieces fit together Validating the policy Deployment on Google Cloud SAP and enterprise systems...
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