Conditions to decide to take a pentest

I have this question about how to decide when planning a pentest is useful or needed from a security point of view. We have scheduled pentests for our customer portals and websites, so they are regularly tested. What about pentesting after changes to a website?Changing a picture and redevelop the entire website are both changes to the website and for these changes it is clear whether the site has to be pentested or not. What about everything in between? I …

changing conditions customer cybersecurity pentest pentesting pentests planning point question security website websites