Final answer:
In large-scale engineering projects, the scientific, ethical, and economic aspects are non-negotiable. Ensuring stakeholder buy-in and maintaining communication are also critical for project success.
Step-by-step explanation:
When approaching a large-scale engineering project, three non-negotiable aspects that must be considered are: scientific aspects, ethical aspects, and economic aspects. Scientific aspects involve the technical and empirical elements that underpin the engineering solutions. Ethical aspects encompass the moral obligations and impact the project might have on society and individuals. Finally, economic aspects are concerned with the financial viability and economic impact of the project, including cost-management and funding.
Furthermore, it's essential to ensure buy-in from all key stakeholders, including researchers, community members, and any directly affected parties, like survivors in a project addressing disaster relief. Regular communication and feedback are crucial, especially during staff transitions which might affect project continuity.