How does successful International Human Resource Management contribute to organizational performance?

How does successful International Human Resource Management contribute to organizational performance? Illustrate your argument with appropriate case studies. Select two of the following strategic functions of HRM to discuss in detail:
Resourcing
Performance Management
Reward Management
Knowledge Management
Training & Development
Employee Relations

Some elements you might want to include in your essay:
Introduce the concept of HRM and provide an argument for how it contributes to organizational performance. You might want to think about best practice vs. best fit, vertical integration etc.
Introduce all of the functions of HRM and how they are integrated into a strategic whole.
Focus a substantial discussion on your selected strategic functions; provide detailed explanations of relevant practices and how they contribute to organizational performance.
Illustrate your arguments with relevant case studies (think about the case studies that we have covered in class, organizations that you are familiar with, or ideas from other modules).