When performing a capacity planning exercise, when would taking measurements be most approriate?

Taking measurements during successful operation provides a stable baseline of resource utilization under normal, expected workload conditions. This baseline is crucial for predicting future needs, identifying trends, and making informed decisions about scaling, rather than reacting to abnormal events.

Taking measurements during an overload or episode captures abnormal peak usage, which is useful for troubleshooting but does not represent typical operating conditions needed for long-term capacity planning.

Taking measurements after an overload or episode primarily helps in post-mortem analysis of the incident but is too late for proactive capacity planning and doesn't capture the actual peak load during the event.

Taking measurements after replacing problematic hardware might confirm the fix, but it's not the primary phase for general capacity planning, which focuses on predicting future needs based on normal operations.