It's possible to test a Product production time on Prodsmart. Just create a Production Order (see How to create a Production Order?) with one unit of that product and afterwards start the production with this button on your device:
Select your Production Order, Product and the first operation you want to start with. Then the following screen will appear:
When you finish the current operation, press the green button to start the next one automatically.
After the last operation is performed, the system will take you back to the Worker Menu and will show you the total time of the operations you have performed.