Hi Mounika,
After: Just after you save/insert/update a form. The action you give will be set only after the form gets updated.
Async: This is special case of After BR. Say you are updating 100 records at once, as this operation takes a long duration to complete and any end user/customer doesn't want to wait until this operation gets completed. Hence, in async BR we give the control to the user but take the action in back end, the operation will be put in a queue and done from back end.
1) Lets say if you want upload bunch of data like 1000 records in your system then that time if you use after BR then you screen get halt till your process not get completed.
Instead of that if you use async BR then this process is running at background so your screen doesn't get halt so you user can do its work without any halting.
2) When you select async BR Priority field populated.
Use of Priority field is:
Priority field is only on the form for async business rule. Since an async rule creates a scheduled job, it just tells the system how important that BR is to you (lower the number to move it closer to the top of the execution queue, raise it to move it back).
3) In after BR you have access to current & previous global object but in async BR you have only access to current global object. No access to previous.
These are the differences in async & after.
Please mark correct and helpful if you find my response worthy based on the impact.
Regards,
Vishakha
