Whenever starting the project of complying 62443-4-2 to the products, there should be a committee to develop a 62443-4-2 complianc table for products, and that is composed by different departmens. However it is difficult to bring out a consensuse of process and specification to fulfill the requirement of 62443-4-2 especially after an intense discussion. It would be a big problem whenever some ergent issues are coming from key account during developing 62443 functionalities. How to mange resouce and reschedule the milestone become a very cirtical consideration. 

By the way, the developer would must account to the different way of considering criteria of 62443-4-2 requirement between issuer and developer, maybe because of some assumption, regulatory, or some restriction, it become a restriction to comply some requirements in 62443-4-2. whenever reason, it should be solved by closly honestly discussing with consultant. Therefore the speaker will share the experience about such situation.