# Thread: Estimation - Testing Phase in Life cycle

1. ## Estimation - Testing Phase in Life cycle

Hi members

Any guess

Roughly speaking what percentage can testing phase takes (on basis of time) in a waterfall model

2. ## Re: Estimation - Testing Phase in Life cycle

That's a very broad question and the answer can vary based on many factors

Analysis - 15
Design - 25
Development - 40
Test - 20

3. ## Re: Estimation - Testing Phase in Life cycle

Hi Sri

It's reaaly a very broad question but usually we take a weak time to complete a Phase that too while releasing we will put that Testing is inprogress....

Regard's
Arunkumar

4. ## Re: Estimation - Testing Phase in Life cycle

We normally estimate 20% for testing in our project, and we normally find it is only enought to perform testing. I asked this question in my QC class I recently joined, and the teacher said that it's normally 40% (for all elements in test cycle: time to understand requirement, produce test plan, write test cases, execute test, report resutls, and analyze the test results).
But it is your negotiation skill to achive this level [img]/images/graemlins/smile.gif[/img]

5. ## Re: Estimation - Testing Phase in Life cycle

Did your teacher tell you where he/she got te information that 40% was normal?

6. ## Re: Estimation - Testing Phase in Life cycle

Good question, Lynne. [img]/images/graemlins/smile.gif[/img]

7. ## Re: Estimation - Testing Phase in Life cycle

I think you will get the estimated time for your testing project from your previous and similar projects in your company (i.e. Historical data). Or you can use COCOMO model to get the estimated time for the testing phase. Am I correct?

8. ## Re: Estimation - Testing Phase in Life cycle

There is another simple way that is (sadly) often used in software projects to compute the time for the testing phase: it just take the time remaining after coding is finished and before the scheduled delivery deadline of the project. Example: for a 6 (elapsed) months project, if programming finish after 5 months, then testing takes only 1 month, so around 17% of the project ;o)

9. ## Re: Estimation - Testing Phase in Life cycle

Testing is usually 40% of SDLC.

10. ## Re: Estimation - Testing Phase in Life cycle

Addie,

Where did you get this number?

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