Linking Tickets Questions (Parent + Child relationship)

[David Longley]

Please can someone let me know if the following is possible for when you link tickets together:

If any linked ticket is re-opened, will all the linked ticket open? If so what happens top this relationship?

What happens if we need to convert to a problem ticket. Is all the child ticket reference transferred as well? 

When reporting does each child ticket count as a separate ticket? If the Parent ticket breaches SLA child tickets do not how is that reported on?