It is a system to limit the visible analysis methods at "Input sample".
Production phases are created at:
Production > Production Phases
Click on "Add”
Enter the description and click on "Save"
The analysis method must be linked to a product:
Quality control > Methods of Analysis - button "Link to product(group)".
Tab "Product group" - choose a product and click "Save".
Then at "Choose" you can select a lab
At Basic Data > Product > Products you can link to a production phase.
Button "Link production phases and analysis methods".
You can now select the production phase at Quality control > Input sample
At "Add sample" a shorter list is now visible
Note: if only one production phase has been created, it is possible that no analysis methods will be visible at Input sample. Either link the production phase to your product; or decide not to work with production phases and delete the production phase.