- January 14, 2013
- Posted by: Anjana V K
- Category: Testing
Metric is an inevitable part of any piece of work being performed. Its a system in place to measure the excellence or rather performance of work delivered. Any work that is not controlled and measured can prove equivalent of incorrect work being delivered. Technology grows in a tremendous pace that entreprises always strive in keeping defined project metrics.
Project metrics can be stated as pre-defined or identified measures or benchmarks, which the deliverable is supposed to attain in order to get the expected value. With clearly defined project metrics, the business groups are able to assess the success of a project. Though certain unstated measures like, if the project was delivered on time and within the budget, existed ever since the advent of enterprises, the need for more analytics in this area has seen a high spike. There are different types of project metric analysis systems in place across the industry like costing, resource, hours based etc. Let me take you through some common project metrics that is much related to the person hours delivered in a project.
Effort Variance (Ev): Its a derived metric, which gives you an alert of having a control on the project. Let there be a project A with the below current attributes :
Planned effort : 100
Actual effort : 150
Project progress percentage : 50
Therefore, at 50 % – 150 Hrs taken
then at 100 % – X Hrs will be taken
X = (100*150)/50 = 300 Hrs., where X is a predicted value for effort within which the project is going to complete.
Hence, the variance Ev = ((Actual – Planned)/Planned)*100
= ((300-100)/100)*100 = 200 %
The variance predicted indicate that the project require attention or it would complete at a much higher cost in terms of the effort delivered.
Schedule Variance (Sv): The Schedule variance also has same calculation in which the number of days is considered instead of the hours.
Weighted Defect Rate: or WDR is a defect metric calculated based on weightage assigned to the reported bugs. The weightage depends on two factors – severity and reporter.
Weightage against severity in descending order : Block, Crash, Major, Minor
Weightage against the reporter in descending order : Client, SQC, Team
And the rate is calculated against the total planned hours for the project.
Cost of Quality: Its the total time spent on review activities in the project. For example, requirements review, design review, code review, test plan review, team meetings for clarifications and client calls etc.
COQ = (Total Review hrs / Total project planned hours)*100
Cost of Detection: The total time spent on testing activity is considered as the cost of detection.
Cost of Detection= (Total Testing Hrs/ Total Project planned Hrs)*100
Cost of Failure: The total time spent on rework in the project is considered as the cost of failure. Rework include bug fixing, design change, test plan change etc.
Cost of Failure (Cost of Poor Quality- CoPQ) = (Total Rework or bugfixing Hrs/ Total Project Planned hours)*100