Hi Vijay,
POSC in EWM works with HU's only and you can have as many processes as you want which process will be followed depends on your products nature. For example some products need to be counted always where some other products need to have quality inspection or some other for VAS. You can define different processes in configurations of POSC.
You can also define new WPT's as per your requirements and new processes can be linked to those WPT's in case of inbound process, which can be determined using process control indicators which is assigned to products in product master. one simple example is below:
Product A should be counted always:
Storage Process: ZIN1 with steps IB01, CNT and IB03
Product B should have quality inspection:
Storage Process: ZIN2 with steps IB01, QIS and IB03
Product C need to go through quality and Value added services also to be performed:
Storage Process: ZIN3 with steps IB01, QIS, VAS and IB03
Hope it is helpful. let us know if you still have doubt.
Regards
Anoop