Usage of resources can be measured by four techniques, name them?

1. Resource tracking: Monitoring and recording the use of resources over a period of time to identify patterns and trends.

2. Resource allocation: Determining how resources are distributed and assigned to different tasks or projects.

3. Resource optimization: Finding ways to use resources more efficiently and effectively to maximize output and minimize waste.

4. Resource evaluation: Assessing the impact and effectiveness of resource usage on overall performance and outcomes.

1. Direct Measurement
2. Activity Analysis
3. Work Sampling
4. Time Study