What is Data Science? Data Science can be infer as union of mathematical analysis (Statistics), Data analysis, machine learning and their inter relation. It can be used for meaningful analysis of structured and non structured data. Venn Diagram for Data Science: Process basically comprises of flow of steps and and it's agile improvement, formal and popular process of Data Science is CRISP-DM. CRISP-DM: 1- Business Understanding. 2-Data Understanding. 3-Data Preparation. 4-Data Modelling. 5-Evaluation. 6-Deployment. 1-Business Understanding: What are business activities? Whether data science can achieve required objectives? How do we define success metrics? Are there ethical consideration in data usage? What have other industries achieve(SOTA)? 2-Data Understanding: What are the source of data? Does new data need to be collected? What are the quantity and quality of data available? What do