Question: What approach is applied to the measurement of 'Mean number of occupied PDs for EGPRS' in Performance Management (PM) for GSM?
Option 1: 2 out of 3 approach
Option 2: Weighted Average Approach
Option 3: Simple Moving Average Method
Option 4: Exponential Smoothing Technique
Explanation: The '2 out of 3 approach' is specifically mentioned in the context of measuring the mean number of occupied PDs for EGPRS, indicating a particular methodology or criterion (e.g., requiring at least two out of three samples to meet a condition) for this measurement. This approach suggests a reliability or validation mechanism to ensure the accuracy of the measured mean, which is crucial in Performance Management for telecommunication networks to make informed decisions based on trustworthy data.