Qlik QVDs allow for the idea of having a (pre-production) App before the (production) App, intended to extract data from a source, do transformations on it, and load that data into a QVD for production to use

This separates each step of the ETL process

Practical Framework

  1. Load data from source
  2. Save data as QVD
  3. Load data from QVD
  4. Transform data
  5. Save data as QVD
  6. Load data from QVD