This is how I think about Tryton and how I pitch it to potential customers.
Looking at your diagram, say 75% already exists in Tryton like the whole ordering process including POS. You can take a look at production but maybe the sale order is already enough. Delivery or shipment is there and also all the inventory and financial parts are fully functional. But you need some work on the CRM side. No idea how deep you want to go into that one but not much exists in Tryton.
For a customer I have created a custom module because they use a VOIP cloud service. That service is using Asterisks and they created a framework to push out phone data. We take that data and just put it in Tryton so the employees can see who called and don’t forget to follow-up on calls. If you have an own Asterisks server, take a look at GitHub - VoIPGRID/cacofonisk: Who's calling?.
Also HR is a field where Tryton is struggling at the moment. That said, it seems you have a team of developers available. But the first thing is to set up a demo server try things out and see by yourself what you are missing. Then with the team you can easily determine what the costs in money and time is.
For both CRM and HR there are some proposals here on discuss but nothing concrete yet and I think because most companies outsource HR and use another system for CRM (unfortunately).
Certain frontends which are already developed keep them, but let them connect to Tryton instead of directly to the ‘Database’. For frontend development I’m using another underdog called ‘emberJS’ which existed before the big names even were thought of.