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Guidelines for Metrics Calculation. Defect Removal Efficiency %(DRE%)Phase-wise Defect Removal Efficiency %(DRE%) for the project Productivity Metrics for the project Defect Density Metrics for the project Effort Metrics Phase-wise Schedule Metrics Phase-wise

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Presentation Transcript
slide1

Guidelines for Metrics Calculation

  • Defect Removal Efficiency %(DRE%)Phase-wise
  • Defect Removal Efficiency %(DRE%) for the project
  • Productivity Metrics for the project
  • Defect Density Metrics for the project
  • Effort Metrics Phase-wise
  • Schedule Metrics Phase-wise
  • Defect Metrics Phase-wise
  • Non-Conformity Metrics
  • Configuration Defect Metrics
  • SQA Metrics for the project
slide2

Defect Removal Efficiency %(DRE%)Phase-wise

    • What is DRE and what do we conclude from DRE?
  • Definition: - DRE % indicates the effective identification and removal of defects both at phase-level and project-level
  • Conclusion from DRE %: -
  • If Over-all Project DRE is between 90%-100%, then the efficiency is said to be at High level.
  • If Over-all Project DRE is between 75%-90%, then the efficiency is said to be at Moderate level.
  • If Over-all Project DRE is below 75%, then the efficiency is said to be at Alarming level.
slide3

When will DRE be given to MR?

  • At the end of the project, DRE for each phase
  • and overall project is calculated and given to MR.
slide4

Defects Removed during a Phase

DRE % = ------------------------------------------- X 100

Defects Removed till date

slide5

Example:

Phase IntroducedRequirement Design Code/Unit Test

Phase Deducted

Requirement 10 -- --

Design 3 18 --

Coding 0 4 26

Testing 2 5 8

Customer 1 2 7

slide6

DRE % @ Requirement Phase = 10/(10+3+0+2+1) x 100 = 62.50 %

DRE % @ Design Phase = (3+18)/(3+0+2+1+18+4+5+2) x100 = 60.00 %

DRE % @ Coding Phase =(0+4+26)/(0+2+1+4+5+2+26+8+7) x100 = 54.54 %

DRE % @ Testing Phase =(2+5+8)/(2+1+5+2+8+7) x 100 = 60.00 %

Note: Here the total defects of one phase are carried over to next phase also.

slide7

What is the reason to carry over the bugs of one phase to another?

For eg: There is some defects found in design phase, which are pertaining to Requirements. Typically these bugs should be removed during requirements phase itself. But since the bugs were not removed in requirement phase and is observed as bug pertaining to requirement phase during design phase, the bugs will be considered as count for both requirements and design phase.

slide8

Defect Removal Efficiency %(DRE%) for the project

Total No. Of Defects before Release/Delivery

DRE % = ------------------------------------------------------ X 100

Total No. Of Defects for the Project

For the above mentioned example,

Over-allDRE % = (10+3+2+18+4+5+26+8)

---------------------------------------- x 100 = 88.37 %

(10+3+2+1+18+4+5+2+26+8+7)

slide9

Effort Metrics Phase-wise

(Actual Effort – Planned Effort)

Effort Slippage% = ---------------------------------------------- X 100

Planned Effort

Note: The Efforts are always in terms of Hours

If the figure is in negative, conclude that efforts put in the project is less.

If the figure is in positive, conclude that efforts put in the project are more.

In both cases please specify the reason while giving metrics to MR.

slide10

Metrics Collection Form For Effort Metrics -Phase Wise

Project Code and Name:

Requirement

Design

Planned Effort

Code/Unit Test

Phase Introduced

Planned Effort

Planned Effort

Actual Effort

Actual Effort

Actual Effort

Requirement

Design

Coding

Testing

Delivery / Release

Prepared By : G. Parthasarathy Reviewed By (MR) : Sign Date :

Data Given by : Sign/Date :

slide11

Schedule Metrics Phase-wise

(Actual Schedule-Planned Schedule)

Schedule Slippage% = ----------------------------------------------X 100

Planned Schedule

Note: The schedule is always in terms of no. of days.

If the figure is in negative, conclude that effects put in the project is less.

If the figure is in positive, conclude that efforts put in the project are more.

In both cases please specify the reason while giving metrics to MR.

slide12

Metrics Collection Form For Schedule Metrics -Phase Wise

Project Code and Name:

Requirement

Design

Planned

Schedule

Code/Unit Test

Phase Introduced

Planned Schedule

Planned Schedule

Actual

Schedule

Actual Schedule

Actual Schedule

Requirement

Design

Coding

Testing

Delivery / Release

Prepared By : G. Parthasarathy Reviewed By (MR) : Sign Date :

Data Given by : Sign/Date :

slide13

Defect Metrics Phase-wise

Defect Metric for a Phase = The Total number of Bugs Identified during the Phase

Note: For testing phase the bugs found during testing is considered and for other phases the review points are considered as defects.

slide14

Non-Conformity Metrics

Total No. Of Non-Conformity Closed during the Quarter

Non-Conformity Metrics = ---------------------------------------------------------------------

Total No. Of Non-Conformity Raised during the Quarter

slide15

Configuration Defect Metrics

Configuration Defect Metrics = Total Number of deviations mentioned in Configuration

Audit

Note: Here deviations indicate the NCs

slide16

SQA Metrics for the project

No. Of Activities Completed

SQA Metric =----------------------------------------------

No. Of Activities Planned

Note: This metrics is given at the end of the project.

slide17

We can improve the Quality process by doing the

metrics also.

I request our Project Leaders to come forward to

Provide data for the metrics to improve our

Quality department.

See you guys with some more stuff on metrics in next article

G. Parthan