Helping Model a “Letter Boxed”‑Style Workflow in ServiceNow — Need Advice

[hellenc]

Hi Community 

I’m working on a fun but surprisingly complex workflow challenge in ServiceNow and thought this community would be the best place to get some guidance.

To explain it simply, I’m modeling a process that’s a bit like the Letter Boxed word puzzle you know that game where letters are placed around a box and you have to connect them to form valid words without repeating letters? The logic has some interesting constraints that I’m trying to represent inside a ServiceNow workflow.

Here’s the gist of what I need to build:

• A set of constraints or stages (similar to the boxed sections in Letter Boxed)
• Items (like puzzle elements) that can only move forward if all criteria are met
• Automated validations at each stage (e.g., “Did this task meet the rules before advancing?”)
• Logging and reporting on when and why anything is rejected

Specifically, I want to know:

1. Best practices for modeling a chained decision set like this should I use Flow Designer, Workflow Editor, or a combination?
2. Are there Script Includes or Business Rules that work well for validating transitions like this?
3. If anyone has built something similar with stage constraints and validations, how did you structure it?
4. Tips on error handling and user‑friendly reporting when something fails validation?

I know this isn’t a typical “game logic” problem, but using the Letter Boxed analogy helped my team think about the constraints more clearly, and I figured someone here might have tackled something analogous in business logic.

Appreciate any insights, patterns, or example snippets you can share!

Thanks