If a business is a system for making and keeping promises, how do you measure its performance?
How many promises you make, and how many you keep.
How much someone pays you to keep your promise to them.
How much it costs you to make a promise, and how much to keep it.
How much it costs you to resource, monitor and improve the way you make and keep your promises.
You could add:
How much it costs the planet for you to run this system.
How much you increase these things for yourself, your team and your clients: