Written, but not started tasks

Please help to understand! There is a Catalog and when a new item is created I need, for example, in tabular section, create five tasks of different type in a predefined order. Types are listed in another catalog or enumeration. But the problem is that those tasks should be templates: after they are created the responsible person and time should be assigned. How can I implement this? Which mechanism should I use? I'm thinking on a document which starts tasks when it is posted.

Can you please explain the task more detailed?

I'm not sure they said they need 5 tasks and they will fill them later...

I think that you should to investigate the business area which is automated first.