Thanks for your feedback Fredrik
Liked your thought but, if I am understanding well your suggestion, it does not address the need to have the system automatically switch to the new batch number as well as having the new batch being consumed using a different ratio.
For example :
Phasing out item is consuming 1kg for every unit produced
Phasing in item needs to consume 1.2kg for every unit produced - I need to manually change the formula to set AX to consume 1.2kg as soon as the batches of the new phasing item are used in production orders.
all thoughts are welcome