System Development Life Cycle(SDLC)


System Development Life Cycle(SDLC)



Software development life cycle (SDLC) is a method accustomed develop a software system. System Development Life Cycle (SDLC) is a series of six main sections and in every section, totally different activities happen.

System Development Life Cycle Sections:

1. Planning
2. Analysis
3. Design
4. Implementation or deployment.
5. Testing and Integration
6. Maintenance

Planning phase:  

This section is that the most important within the construction of a fortunate system. during this sectionwe tend to decide what specifically we wish to try to to and which kind of issues we’ve got to face and the way we will solve that issues.

Activities exhausted this section

  • Describing the objectives, resources and issues like prices and personnel.
  • Planning concerning the way to create your product higher than your competitors.
  • Planning concerning the power of recommending various solutions when meeting with shoppers, suppliers, consultants and staff.

The outcome of the system coming up with section is to outline the varied technical approaches that may be followed to implement the project with success with minimum risks.

System Analysis Phase

The aim of the System analysis section is to detention the detail of every demand and to create positive everybody understands the scope of the work and the way each demand goes to be completed. System analysis is that the most significant and essential stage in SDLC. it’s performed by the senior affiliates of the team with inputs from the client, the business department, market surveys and domain consultants within the business.

Activities exhausted this section

  • Determined end user’s necessities.
  • Documented end user’s expectations, and describe however that may
  • Prototypes may be engineered to indicate the client what the tip product can appear as if
  • Studying multiple use cases to explain every action that a user can absorb the new system

It’s vital to keep up sturdy communication level with the clients to create positive you’ve got a transparent vision of the finished product and its functions.

System Design Phase

System design helps in specifying hardware and system necessities and conjointly helps in shaping overall system construction.
The design section comes when an honest understanding of customer’s necessities, this section defines the basics of a system, the elementsthe security level, modules, design/architecture and the totally different interfaces and kind of knowledge that goes through the system.

Activities exhausted this section

  • Pick out architectural design for system
  • Defines all the elements that has to be developed
  • Communications with third party services
  • User flows and DB communications similarly as front-end representations
  • Behavior of every elements

A general system design may be through with a pen and a bit of paper to mend however the system can appear as if and the way it’ll performthen a close and extended system style is created, and it’ll meet all practical and technical necessities, logically and physically.
Implementation or deployment Phase

In this section, programming code is formed. If the design is performed during a elaborate and arranged manner, code generation may be accomplished while not a lot of disturbance. during this section the most focus for the developers. during this section the actual coding writing and unit testing of the method by the event team.

Developers got to follow the code writing guideline outlined by their organization and programming tools like compilers, interpreters, debuggers and then on are accustomed generate the code. High-level programming languages like C, C++, Pascal, Java, and PHP are used for code writing. The programming language is chosen with relevance the kind of software system being developed.

The system is prepared to be deployed and installed on customer’s locations, able to become running, live and productive, coaching is also needed for finish users to create positive they savvy to use the system and to urge accustomed to it, the implementation section might take an extended time which depends on the complexions of the system and the solution it presents.

This is the longest section of the software system development life cycle. The finished product here is input to the Testing section.


System Testing and Integration

In this section, brings totally different components and subsystems along to form the entire integrated system, then Introducing the system to totally different inputs to get and analyze its outputs and behavior and the way it functions.

After the code is developed it’s tested against the necessities to create positive that the merchandise is truly determination the requirements addressed and gathered throughout the necessities sectionthroughout this sectionall kinds of practical testing like unit testing (know a lot of..), integration testing, system testing, acceptance testing are done similarly non-functional testing also are done.

The testers aim to search out defects within the system similarly as verifying whether or not the application behaves for sure and in keeping with what was documented within the necessities analysis sectionit’s potential that defects are known within the testing section. Once a defect is found, testers inform the developers concerning the main points of the problem and if it’s a valid defect, developers can fix and make a replacement version of the software system that has to be verified once more.

System Maintenance Phase

This is conjointly one among the most phases of SLDC. Once once the customers begin exploitation the developed system then the particular issues come back up and wishes to be solved from time to time. during this section, periodic maintenance for the system are meted out to create positive that the system won’t become obsolete, this can embrace exchange the recent hardware and endlessly evaluating system’s performance, it conjointly includes providing latest updates for sure enough elements to create sure it meets the proper standards and therefore the latest technologies to face current security threats.


At every stage in the SDLC defined on top any software system development methodology, it’s a repetitive method for every project. It’s vital to say that wonderful communication level ought to be maintained with the client, and Prototypes are vital and useful once it involves meeting the necessities.

The period and therefore the activities in every section rely on totally different models of system development life cycle came up from the thought of saving effort, cash and time, additionally to minimizing the danger of not meeting the customer’s demand at the tip of project, a number of these models are SDLC iterative Model and SDLC Agile Model.

“Related post”

Software Development life cycle

Software Testing Life Cycle

Test Case Documentation

Alpha and Beta Testing

Regression Testing

Smoke and Sanity Testing

Software Testing

Validation and Verification


Entry and Exit Criteria in software testing

Integration Testing 

Automation Testing


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