To me, the only way to know that you implemented it correctly is to test it out regularly to see if it really:

1. brings value to the end users,

2. doesn't make the staff go crazy

3. and makes the company sustainable

Outside of that, one of the smart ways to implement a new service is to do it like it's done with software: first, run an alpha version, improve it, run a beta version, and so on.

Recommended resources

For more details about the implementation side, you might be interested in:

1. Public Service Design: A guide for the application of service design
   in public organisations

2. Service design and delivery process by the Australian Government Digital Transformation Agency