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How to prepare Impact Analysis

 
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vijaynedunuri
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Joined: 11 Jun 2006
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PostPosted: Thu Jun 29, 2006 8:43 pm    Post subject: How to prepare Impact Analysis
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HOW TO PREPARE IMPACT ANALYSIS

AT WHAT SITUATION IT WILL BE USED

AFTER CODING OR BEFORE CODING

PLZ REPLY
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ofer71

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Joined: 27 Dec 2005
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Location: Israel

PostPosted: Fri Jun 30, 2006 12:52 am    Post subject:
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Impact analysis is too general term to be explained, but I can give you an example:

One of our customers wanted to change a DB2 column's length from 2 to 3. Our tool then performed an Impact Analysis and reported on all impacts if we change the column: Database, business programs, utilities, JCLs etc.

O.
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Manojudha

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PostPosted: Fri Jun 30, 2006 11:14 am    Post subject: Re: How to prepare Impact Analysis
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Impact analysis should be done as part of your analysis before you start of with the coding..

You should list the changes in every relevant area with respect to the changes you make.

1. The changes could be in Copybook, Online programs, Batch programs, JCLs, Procs, Control Cards, Database or in files.

2. In case of change in copybook you might require to analyse if the programs calling the copybooks requires modification or just compilation

3. In case of programs you need to verify for the static and dynamic calls and require recompilation.

4. You can either list out based on Impacts or list out based on the type of component.

Am I answering your question
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Manojudha

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PostPosted: Fri Jun 30, 2006 2:00 pm    Post subject: Impact Analysis
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Hi ofer71

Could you Please let me know the details of the tool that you used for your Impact Analysis.

Thanks in Advance
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sridevi_taurus

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Joined: 25 Jun 2006
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PostPosted: Wed Jul 12, 2006 10:50 pm    Post subject: Re: How to prepare Impact Analysis
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hi,
Impact analysis is finding whether any code changes we make effect the other parts of the program or other programs eg.copybooks etc.
By performing impact analysis we will know how the change affects the environment of the program.

I think Impact analysis is done manually and we don't use any tools. Correct me if I am wrong.

regards,
Sridevi
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diwa_thilak

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Joined: 13 Jul 2006
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PostPosted: Thu Jul 13, 2006 12:02 pm    Post subject: Re: How to prepare Impact Analysis
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Hi,

I go with what sridevi has told about Impact Analysis. I try to give u simple example which i encountered.

We got a key (Store Number) which is 3 digits, due to the expansion of the store we have to make it as 4 digits.

Now the impact analysis starts,

1. Now we have to check for the programs / procedures which is using this key.
2. Also we have to check the downstreams ( where we pass the store number) which is getting affected.
3. Check for Tables which is getting updated.

So far i haven seen tool for this, we use to do it manually....
Hope i could make it clear for you.
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