Which of the project definition in project management must be filled before you can release a project?

The probability technical success filed is enabled for questionnaires. You have defined a questionnaire for portfolio items In customizing. When you want to fill out the questionnaire for the probability technical success filed an error message is displayed.
What is the reason for the error message?

In a existing project management project, all objects have been released and allsubordinatetasks for the checklistitemshave been completed.
Why does the status change fail when you try to set the status of the checklist to Finish?
How can you trigger a workflow for a portfolio item?

What can you define in the item template?

You are in portfolio management and create a project system (PS) project from an item.
Which parts you add afterwards directly in PS?
NOTE: There are 3 correct answers to this question