Trace changes on software

Hi all ,

Can someone suggest something in order to keep track of the changes beeing done on a platform ?

Example

our CRM has x forms with some workflows implemented.

How can we keep track when a user lets say ask's to implement a new field on a form with some new functionality in it , in order to avoid any damages on the pipe line/code etc.

One dumb way would be let's say keep every change on a piece of paper and design diagrams etc…

Thank you for your time.