When you spot a broken process, ask the person running it to walk you through each step. Listen for where it gets stuck, then share a concrete example of how you've done it better. Questions beat criticism.
If it is about questionable module, then let's put yourself in a situation to where you are learning about a process. You're seeing everything that's wrong with it. How can you voice your input in a constructive way? Well, let's ask someone. Can you walk me through what this process is and what it's about? What it's for? What are the steps to it? And then as you had that dialogue, you can point out areas. Oh, okay. Well, I've done this part before. Instead of it taken me five steps, it only took me two. And would you like to know how? And so that is a form of taking on that challenge of being questionable.
