Portfolio of research evidence

Required a portfolio of evidence, observation as a research method, data gathering, data collection outlining their various approaches for the research topic below
Topic/ Question
How do global threats (e.g. Covid-19 pandemic) change the way Multinational Enterprises manage their global workforce?
Structured guidance in addressing the question in the portfolio:

International Staffing
International Staffing Policy
Role of recruitment in driving organisational performance
Training and Development