Best practise for change management

Question

HI,

 

i am working in small software company for a long time which is very weak in process. our company do the change in software when they get mail from client and we do not follow right process to keep the change management info some where.

 

so please tell me best practise big and middle company follow to do the change management properly as a result later very easily we can find out the change management details. thanks