Execution is about leading people to complete tasks under budget and within the schedule to produce quality output while keeping stakeholders informed and supportive. Collecting performance data, preparing performance information, and communicating performance report is crucial.
The task output will be verified internally for the correctness and validated externally for effectiveness. Scope baseline, cost baseline, schedule baseline, and performance measurement baseline may be subject to change due to corrective actions or continuous improvement resulting from performance review or problem-solving process.
Baselines are anything of importance that requires signoff or approval to control changes against them. Change management is the process of protecting baselines from creeping.
Configuration Management is one form of change management that controls the changes to the configuration baseline. A configuration item can be any entity or attribute of IT assets.