GeekInterview.com
  I am new, Sign me up!
 
GeekInterview.com  >  Interview Questions  >  Testing  >  QA Testing
Go To First  |  Previous Question  |  Next Question 
 QA Testing  |  Question 142 of 176    Print  
What is the meaning of Effort Variacne , Schedule variance , Residual Defect Density , and Productivity? and what are the difference ?

  
Total Answers and Comments: 1 Last Update: December 09, 2007     Asked by: sriramrks 
  
 Sponsored Links

 
 Best Rated Answer
—

No best answer available. Please pick the good answer available or submit your answer.
December 08, 2007 23:30:55   #1  
dilton_dalton Member Since: December 2007   Contribution: 14    
RE: What is the meaning of Effort Variacne , Schedule variance , Residual Defect Density , and Productivity? and what are the difference ?
I am not sure why this question is under the topic of QA testing.
Variance is the difference between what was planned and the actual value. Two variance values related to the project tracking method known as "Earned Value" are the "cost variance" and the "schedule variance" both of which are expressed in monitary terms. To understand what these terms mean look up the earned value method in the internet. (e.g. http://evm.nasa.gov/definition1a.html) If effort variance is defined in a similar manner as the other two then it would be the difference between the Effort actually expended to a given date less the Effort planned to be expended by the same date.

Defect density is the number of defects divided by some measure of size. The residual defect density is the number of defects remaining in a product at any stage if its development divided by the size. There are a number of different ways of doing this calculation. The defects may be any type of defect or they may be limited to functional defects (the kind that can be found by testing). Size may be total size or it may be the sum of new and changed elements (e.g. lines of code or UML diagrams). It is normally important that the size be trackable (e.g. lines of code produced can be tracked but number of function points produced cannot.) There are several methods for estimating residual defects based on extrapolation of defect discovery rates.

Productivity is the ratio of output to input. It can be expressed in any number of ways. Revenue/employee is one that is used quite often at the corporate level. Others used in software development include Lines of code per developer month Function Points per developer month Test cases executed/tester month ... The list of possible ratios is very large. Generally these ratios are intended to be used for estimating purposes but many people are fearful that they will be used to compare the performance of individuals. If that is done then the people who are being measured will "game" the measurements so that they will look good which will often have a negative affect on the actual product. As a general rule metrics must never be used to reward or punish individuals.

 
Is this answer useful? Yes | No

 Related Questions

What is the job of Quality assurance engineer? Difference between the testing & Quality Assurance job.
Read Answers (7) | Asked by : Beena
Hi, friends All are doing fine with great strengths here i have some doubts 1) What are the demerits of winrunner?2) We write the test data after what are the principles to do testing an application?3) When we are in system testing but suddenly the customer wants to change something in the req phase and also he finds it is most visible to end user then we are again testing the whole application or particular module like to test the unit and integration and system testing. Because that I think it
Read Answers (2) | Asked by : sathish
Latest Answer : When product is not as per the functional document specification then we consider it as employing the failure mode and defect analysis.. ...
Read Answers (1) | Asked by : devi
Latest Answer : The basic elements can include: 1. Issue Description2. Pre-Requisite or Data Setup (whichever suitable)3. Steps to reproduce4. Expected Result5. Actual Result6. Any cause observed for the occurence of bug7. The effect observed due to the cause(6th ...
Read Answers (9) | Asked by : sheetal
Latest Answer : Test Case: A description, purpose and set of steps including pass/fail criteria to test a function as specified in a Functional Design Specification document. The test case reflects the behavior of the functions as written in the design doc, so there ...
Read Answers (9) | Asked by : Raji
Latest Answer : Effort Variance= (Actual effort-estimated effort)/Estimated effort*100Schedule Variance=(Actual elapsed time- estimated elapsed time)/estimated elapsed time*100 ...
Read Answers (6) | Asked by : sree880
Latest Answer : Hi All,Patch : It is a addition of code or fixing the bug in the released product by giving the additional installer or exe which will over-write the defect. Here user/customer need not install the whole product.Build : It includes the code which change ...
Latest Answer : Integration Testing : Tests interaction between the integrated modules.System Testing: Tests an integrated system to verify that it meets its requirementsSystem Integration Testing : Verifies that a system is integrated to any extended or third party ...
Latest Answer : Contents of defect are Defect ID, Summary, Description (environments, steps to reproduce, Expected values, Actual outcome), Status, Severity, Priority, Reproducible (y/n), Detected by, Detected on, Module, Build/version id, Test ...
Read Answers (6) | Asked by : skufaty
Latest Answer : Hi,Difference Between Stub& Driver1. Stub is a piece of code emulating a called function, a driver is a piece of code emulating  a calling function.2. Stubs are created integration testing like Top-down approach, Drivers are created integration ...
Read Answers (6) | Asked by : lakshmanan

 Sponsored Links

 
Related Articles

What is difference between call by value and call by reference in function?

The arguments passed to function can be of two types 1. Values passed 2. Address passed The first type refers to call by value and the second type refers to call by reference. For instance consider program1 main() { int x=50, y=70; interchange(x,y); printf(“x=%d y=%d”,x,
 

Testing and Integration

Once the software is complete, it will go though rigorous testing before its actual integration.  In this article we will take a look at different types of software testing and also different types of integration. With the diversity of business setting and software development models, it al
 

The Interview Snafu

How to turn someone else’s mistake to your advantage Your dream job is about to become reality. A recruiter gave you the heads up about the perfect position at Humungous Conglomerate, Inc. You went through five interviews as well as a battery of psychological tests mandated by their HR de
 

Winning a Job Interview with a Winning Resume

Does your resume unlock your potential, take your skills to the highest level and win you the interview and the job you want now? The job market today is highly competitive and even if you think you have what it takes to get an interview you won’t get over the line without a polished, prof
 

Client-Server Testing Technology

Client Server Testing Technology Client Server Software Client server software requires specific forms of testing to prevent or predict catastrophic errors Servers go down records lock I O Input Output errors and lost messages can really cut into the benefits of adopting this network technology Test
 

Importance of Proper English during Job Interview

Importance of Proper English during Job Interview Your job interview is crucially important and it will determine whether or not you will get the job Depending on the type of job you re going for it is very important for you to use proper English In most cases jobs which offer higher salaries will h
 

Difference between Scholarship and Grant

Difference between Scholarship and Grant While both scholarships and grants allow students to pay for their tuition without having to pay the money back there are a number of key differences between the two Knowing the difference between grants and scholarship will make it much easier for students t
 

HR Interview - HR Interview Mistakes You Will Want To Avoid

HR Interview Mistakes You Will Want To Avoid The job interview can be a stressful process This is especially true for those who are going after a competitive position Your nonverbal communication combined with the answers you give during the interview will determine if you are hired mosgoogle While
 

Software Testing Myths

Software Testing Myths Any IT professional is sure to know the different phases of the Software Development Life Cycle or SDLC namely Feasibility Study Requirement Analysis Design Construction or Coding Testing Implementation Maintenance Support the activities carried out in each phase their sig
 

HR Interview - Behavioral HR Interviews

Behavioral HR Interviews As the name implies a behavioral interview is an interview that is held by a human resources department to determine if an applicant has the behaviors that are appropriate for a job The company must know how an applicant will behave in a certain situations mosgoogle The logi
 

About Us -  Privacy Policy -  Terms and Conditions -  Contact -  Ask Question -  Propose Category -  Site Updates 

Copyright © 2005 - 2009 GeekInterview.com. All Rights Reserved

Page copy protected against web site content infringement by Copyscape