because a process needs to be run you need to connect to all those legacy systems that are responsible for changing the tariff from the what's a BSS layer to OSS there sometimes this takes time so trying to see what are the transactions that you have minimal number number of errors so if you have a change start process that is really if qualification of well staff user can jump into is really good at first then your execution part will mostly be successful but if it's slow you can use the pattern where you store the message