The benefits of collaboration are hard to quantify. With the exception of email and audioconferencing, collaboration hasn't reached the phase where we're wondering what we ever did without it. Application development and delivery (AD&D) professionals at the helm of the collaboration leadership team should read this report to learn how to track the progress of their collaboration programs and tailor their choices of metrics to stakeholder expectations. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy.