useful Metrics in Testing
ttribute | Description | Metrics /Measure |
Correctness | The degree to which the software performs the required functions accurately | Defects / KLOC or |
Maintainability | Maintainability is the ease with which a program can be correct if an error occurs. | MTTC (Mean time to change) -- Once error is found, how much time it takes to fix it in production. |
Integrity | This measure the system’s ability to with stand attacks to its security | Integrity = Summation [(1 - threat) X (1 - security)] |
Usability | How usable is your Software program | * -Skill required to learn the system |
Defect Removal Efficiency | Defect Removal Efficiency (DRE) is a measure of the efficacy of your SQA activities..Ideal value of DRE should be 1 which means no defects found. | DRE = E / ( E + D ) Where E = No. of Errors found before delivery of the software and D = No. of Errors found after delivery of the software. |
Test Coverage | Number of units (KLOC/FP) tested / total size of the system | |
Quality of Testing = | No. of defects found during Testing/(No. of defects found during testing + No of acceptance defects found after delivery) *100 | |
Customer satisfaction index | Number of system enhancement/Maintainence requests per year | |
Reliability | Availability (percentage of time a system is available, versus the time the system is needed to be available) |
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