You might have heard about the ETL technique as it is widely used in most current Business Intelligence projects. Having said that, I am usually surprised how often experienced consultants avoid approaching projects in a systematic way and instead use one application to do absolutely everything, from extracting data from a database to data cleansing to creating visualizations.
An ETL approach helps you have an understandable and easy-to-manage project. Think of it as a chest of drawers. You put your T-shirts in one drawer, your underwear in another drawer, and your accessories in a different one. It will be a lot easier for you to know if something is missing by splitting your clothes into compartments and it is exactly the same in a Qlik Sense project.
Always think of your project as a global one. If you do everything in one place, there...