Happy New Year 2014!
to you all.
a. This program is a method for involving the customer in the design of the service delivery.
b. This program is a method to involve the customer in the design of the service delivery.
Differences, as you see them? Your preference?
They both seem to be out there.
This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
End of topic.