In this section, we are going to discuss the difference between the SDLC and STLC as we understood that both are an integral part of Software testing.
But before we see the difference between SDLC and STLC, first, we will understand the SDLC and STLC in brief.
What is SDLC?
Software Development Life Cycle [SDLC] is a classification of individual activities executed throughout the software development process.
The SDLC includes various phases, and each phase has several activities, which help the development team design, create, and deliver a high-quality product.
What is STLC?
Software Testing Life Cycle [STLC] is the order of different activities executed throughout the software testing process. Testing itself has many phases called STLC, and each activity is done to improve the quality of the software product.
Difference between SDLC and STLC
In the below table, we have listed some of the important difference between the Software Development Life Cycle and Software Testing Life Cycle:
S.NO |
Comparison basis |
SDLC |
STLC |
1. |
Explanations |
It is primarily
connected to software development, which means that it is the procedure of
developing a software application. |
It is mainly linked
to software testing, which means that it is a software testing process that
contains various phases of the testing process. |
2. |
Representation |
SDLC stands
for Software Development Life Cycle. |
STLC stands
for Software Testing Life cycle. |
3. |
Resources |
While performing the
SDLC process, we needed a greater number of developers to complete the
development process. |
The STLC process
needed a smaller number of testers to complete the testing process. |
4. |
Focuses
on |
Besides the
development phase, other phases like testing are also included. |
The STLC concentrate
only on testing the software. |
5. |
Objective |
The objective of
the Software development life cycle is to complete the
development of software successfully. |
The objective of
the Software testing life cycle is to complete the testing
of software successfully. |
6. |
Help
in |
The SDLC will help
us to develop a good quality software product. |
The STLC will helps
to create the software bug-free. |
7. |
Different
phases |
The various phase
includes in Software Development Life Cycle are as follows:
|
The various phase
includes in Software Testing Life Cycle are as follows:
|
8. |
Requirement
collection phase |
In the SDLC
Requirement collection phase, the BA [Business Analyst] and PA [
Product Analyst] will collect the requirements and interpret
business language into software language. |
In the Requirement
Analysis phase of the STLC, the QA [ Quality Assurance] |
9. |
Designing
phase |
Based on the
requirement understanding, the development team will develop the HLD
[High-Level Design] and LLD [Low-Level Design] of the software. |
Generally, in STLC,
the Test Architect or a Test Lead plan the test strategy. |
10. |
Coding
phase |
In the SDLC coding
phase, the developer will start writing the code as per the designed document
and beginning of building the software. |
In STLC, the QA team
writes the test scenarios to authenticate the quality of the product. |
11. |
Environment
Set up |
After writing the
code, the development team sets up a test environment with the developed
product to validate the code. |
Based on the
prerequisites, the Test team confirms the environment set up. And do one
round of smoke testing to ensure that the environment is stable for the
product and ready for testing. |
12. |
Testing
Phase |
Once the environment
has been set, the test engineer will perform various types of testing, such
as Unit, Integration, System, Retesting, Regression testing, and
so on. |
Based on the test
cases, the tester will do one round of integration and system testing. |
13. |
Deployment/
Product Release phase |
In the SDLC
deployment phase, when we received sign-off from various testing teams, the
application is deployed or installed in a production environment for real
end-users. |
In STLC, the Smoke
and sanity testing are performed in the production
environment as soon as the product is deployed. |
14. |
Maintenance
Phase |
Once the product has
been deployed, the development team includes support and release updates. |
To check maintenance
code deployed, the QA team performs the regression suites. |
15. |
Performed |
The SDLC phases are
done before the STLC phases. |
The STLC phases are
completed after SDLC phases. |
Conclusion
The SDLC and STLC provide a structure to
the development and testing of software.
Generally, the test engineer may feel that the Software
development life cycle is appropriate to developers only. Still, after
understood the complete process of the development and testing life
cycle, we can say that both life cycles are dependent and time to time
performed in parallel.
Hence, it is beneficial even to test engineers if they
understand the SDLC phase with STLC.
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