Not always in phase...
That´s how you could call it when the working speed of man and machine cannot be properly matched because the employee has other tasks or needs.
As a simple and therefore cost-effective idea for decoupling man and machine, a manufacturer of brake pads used a combination of open-plastic-link conveyor-belt with a sorting plate at the end.
This allows the operator to carry out his downstream activities in a time-decoupled manner and, of course, also to carry out a visual inspection.
A simple and cost-effective solution, which can of course also serve as a preliminary stage for the next step, which is automation.

Technical data:
Plastic link chains Conveyor belt and sorting plate are precisely tailored to the application. Dimensions can be adapted to your application.