What is it
A new feature in CRM 2013 called Business Rules or Portable Logic
What can it do
Make a field businsess required
calculate a fields value based on values in other fields
validate a field, showing an error message if an invalid value is input
disable a field
Why do you need to know it
Business rules also run on the Tablet and mobile apps
Why is it important
It allows non developers to add validation and functionality (hide/show/disable fields) to a CRM form.
Business rules will also work on the tablet application, hence why business rules are also known as portable business logic
Why's it good for customers
Reduces the dependancy on developers to add form validation, field calculations and hiding/showing/disabling fields. This will allow customers to create business rules
Why's it good developers/consultants
Business rules have to be created in pairs, e.g. one rule to hide a field and another rule to show the field. Most first time users of business rules forget to add the second rule.
Will it change in the future
Yes, its going to get even better with IF/Else conditional statements in CRM 2015.
CRM 2015 will also add improved calculations and rollup fields
Where Can I find out more