System Engineering HW6

The textbook is Systems Engineering Principles and Practice, 2nd Edition. Alexander Kossiakoff and William.
Please answer this 2 question
10.3 Why do so many new complex system developments incur large risks by choosing to apply immature technology ? give an example of where and how such choices paid off and one where they did not.

12.4 A PDR is an important event during engineering design and the systems engineer has a key role during this review. Assume you (the systems engineer) have been given the assignment to be the principal presenter for an important PDR. Discuss what specific actions you would take to prepare for this meeting. How would you prepare for items that could be considered controversial ?