There are many possible benefits that have been identified in several studies and finally, the existing products have matured through experience in various projects. There also are various challenges that are known and need to be addressed. To figure out, if for your specific case, a process bus solution is beneficial, you first of all need to define what you want to achieve. There are various drivers to go for a process bus solution (cost and size reduction, or increase of safety.) You also need to analyze the possible solutions to see if you can achieve your targets with them.