Please explain a little more on why the
8D isn't suitable. This format is not only for automotive. It can be used for almost any corrective action. The detail imposed by the 8D format is what makes it so effective as a tool.
Maybe we need to know more about your telecom service specifications and requirements. Is there something there that eliminates some of the 8-D discipline?
Have you looked at the 5-Y format? Try a search in the Cove for 5-Why. I am sure there are some good examples.
Dave