21.2 Section 21.3.3 describes the following two development productivity metrics: DevP and FDevP.(1) Compare DevP and FDevP including references to their managerial implementation characteristics as well as to their validity. (2) Which of the above metrics would you prefer? List your arguments.21.3 Section 21.4 lists metrics for HD and corrective maintenance services.(1) Explain the difference between these services. (2) Justify the separate metrics categories and the actions based on their differences.21.4 Section 21.4.3 describes two maintenance failure density metrics WSSFD and WSSFF.(1) Evaluate each of the above metrics asto the degree they fulfill the requirements for software quality metrics as listed in Frame 21.2. (2) Indicate the expected direction of distortion for each of the metrics.21.5 HD services are vital for successful regular use of a software system.(1) Suggest situations where the HD service is a failure. (2) What metrics can be applied for the failure situations mentioned in (1)?
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