1. Engagement of an external technical party to review the design you are proposing to ensure that it meets the business needs and is technically viable

2. Architecture that you designed is externally reviewed by a big consultancy who promptly treat it as an opportunity to troll for business at your company. At worst, they see it as an open invitation to sell you anything and everything, while ignoring that you exist. At best, they fail to recognise the you exist.

3. (Cynically) A time wasting exercise so that management can feel that they understand what you have spent three months researching and developing after selecting you to do exactly this job. Most likely they have little idea of what your network really does.