COQ (Cost of Quality)

Formula = [(Appraisal Effort + Prevention Effort + Failure Effort) / Total Project effort] * 100
Unit Of measure = Percentage

Please refer to the below picture for the testing cost curve,

Some metrics related to the entire Test cycle.

Schedule Variance

Schedule variance wrt Latest Baselines
Formula = {(Actual End Date - Latest Baselined End Date)/(Latest Baselined End Date - Latest Baselined Start Date)} *100
Unit Of measure = Percentage

Schedule variance wrt Original Baselines
Formula = {(Actual End Date - Original Baselined End Date)/(Original Baselined End Date - Original Baselined Start Date)} *100
Unit Of measure = Percentage

Effort variance

Effort variance wrt Original Baseline
Formula = {(Actual Effort - Estimated Effort) / (Estimated Effort)}* 100
Unit Of measure = Percentage

Effort variance wrt Last Revised Baseline
Formula = {(Actual Effort - Revised Effort) / (Revised Effort)} * 100
Unit Of measure = Percentage