Which metrics are used to assess the performance of a system against its requirements?

Which metrics are used to assess the performance of a system against its requirements?

• A. Technical Performance Measures (TPM)
• B. Model
• C. PAT&E
• D. Outlay

Answer: (A)

Technical Performance Measures are the metrics used to quantify how well a system meets its stated requirements. They are defined for each critical performance parameter and tied to explicit targets or thresholds, so you can objectively gauge progress. By collecting TPM data during design, integration, and testing, you compare actual performance with predictions, identify gaps, and drive design decisions or risk management. TPMs provide early signals that the system may not meet its requirements, enabling timely corrective actions before deployment. For example, a requirement specifying a response time under two seconds can be tracked with an actual time TPM and a percentile performance TPM to ensure the target is met. A model is a representation of behavior, cost measures like outlay reflect expenditure, and PAT&E relates to planning and evaluation activities, not direct measurements of technical performance against requirements, so they don’t serve the same purpose as TPMs.

Technical Performance Measures are the metrics used to quantify how well a system meets its stated requirements. They are defined for each critical performance parameter and tied to explicit targets or thresholds, so you can objectively gauge progress. By collecting TPM data during design, integration, and testing, you compare actual performance with predictions, identify gaps, and drive design decisions or risk management. TPMs provide early signals that the system may not meet its requirements, enabling timely corrective actions before deployment. For example, a requirement specifying a response time under two seconds can be tracked with an actual time TPM and a percentile performance TPM to ensure the target is met. A model is a representation of behavior, cost measures like outlay reflect expenditure, and PAT&E relates to planning and evaluation activities, not direct measurements of technical performance against requirements, so they don’t serve the same purpose as TPMs.