Trending September 2023 # Impact Analysis In Software Testing # Suggested October 2023 # Top 16 Popular |

Trending September 2023 # Impact Analysis In Software Testing # Suggested October 2023 # Top 16 Popular

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What is Impact Analysis?

Impact Analysis is defined as analyzing the impact of changes in the deployed product or application. It gives the information about the areas of the system that may be affected due to the change in the particular section or features of the application.

The impact is analyzed on Requirements, Design & Architecture, impact on Test and impact on schedule.

With the incorporation of new features into application or product, it becomes imperative to check the influence of these new features or changes on the performance of the system. For this reason, Impact Analysis is done.

Why is Change Impact Analysis is done?

It is done to understand the possible outcome of implementing the change. Inducing too much functionality into a product can reduce the overall performance of the product.

To identify all the files, documents and models that might have to be modified if a team decides to implement the change in product

To estimate the effort needed behind implementing the change

To identify the task required to implement the change

It will list the dependencies on a specific element



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What is Impact Analysis Document?

Impact Analysis document can be used as a checklist. It is used to evaluate change request before working on them. The Impact Analysis document should give details like

Brief description of an issue

Explain or show an example of how the defect is causing failure and/or inefficiency

Include an estimate of complexity

Include an estimate of cost and time for a fix

Functionality to be tested

List down the new test cases created for the change

Reference document- Mention the reference document, technical specification, etc.


Impact Analysis Document.

Change Request ID:



Date Prepare:

Prioritization estimate:

Relative Benefit

Relative Penalty

Relative cost

Relative risk

Estimated total effort: …..hours

Estimated lost effort: ……..hours

Estimated schedule Impact:……days

Quality Impacted;

Other Requirement affected:

Other tasks affected:

Integration issues:

How to present Impact Analysis influence level

Impact Analysis can be marked as per the color code to represent the criticality of the changes or impact of the changes over the system. The color code could be anything as shown below.

Red- Strong

Yellow- Moderate

Green- Weak

The above table explains the impact of the implemented changes

Features that are marked with red indicates the main features which are changed, those with yellow are the features that are less influenced by the change and those with the green are the least one.

Features mentioned vertically resembles those features that are changed while horizontally those features are mentioned which performed changes can influence. For example, in above example the change in feature 1 influence the feature3

For a larger project where features and functionalities are more then above table may not be of any use. In such case, another approach is adopted, where developer straightaway marks the level of influence due to the changes in main features. As shown below where the impact of the Main feature is marked for respective sub-features.

Sample Questions to be addressed for performing Impact Analysis

Does any tool be acquired in order to implement and test the change?

If the change is accepted how much effort will be lost that is already been invested?

To verify the proposed change does other user input be required?

Does the change increase the product cost?

Does the proposed change is something the current staff has knowledge and skills?

Does the proposed change place any unacceptable demand on any computer resource?

Best practices for change Impact Analysis

Before initiating with Impact Analysis, make sure testing request contained no information about those part of the project that was influenced by changes

Continue communication between developer and tester is must, not to miss any change needed to implement in the final product

Identify if any user interface changes, deletions or additions are required.

Estimate the number of acceptance, system or integration test cases that will be required

Identify any impact of the proposed change to another project plan, configuration management plan or quality assurance plan.


The impact analysis will assure what part of an application need to be changed

The impact on the system is analyzed on Requirements, Design & Architecture, impact on Test, etc.

It helps to analyze what level of regression testing is required

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