Hello,
I once had a similar idea for in-game “Production Plans” feature. More info here:
https://forums.eveonline.com/t/feature-request-production-plans
If you are interested doing it yourself, consider using workflow engine called Camunda
https://github.com/camunda
The project is open source and has web based BPMN diagram editor render engine
Source: https://bpmn.io/
Imagine designing and visualizing EVE Online production plans in-game this way 