What Is a Software Development Life Cycle?

A set of instructions for the computer to read and understand to perform a specific task is called a Software. Software development is the process to use computer programming to develop a software. This is not new for many, but the topic under consideration will be new for many. SDLC or Software Development Life Cycle, is the process of developing a new software.

The process of developing a software is not difficult to understand. The procedure of SDLC goes like this:

  1. Gathering and then analyzing the requirements to develop a software
  2. Designing of the software
  3. Coding or programming
  4. Testing the software
  5. Deployment
  6. Maintaining the software

Gathering and Then Analyzing the Requirements to Develop a Software

This is the initial phase. Like starting any business, starting to work on a new software requires a plan. The planning phase will include the project managers, stakeholders and even some senior software developers. No matter how professional or for how long the software development company has been operating, the planning is not an easy phase to follow. Although, it would take less time for experts to plan a new project and then to start working on it but still there will be some questions that must always be answered before taking on any project. Following are some questions, which needs answers before taking on the project:

  • Who will be using the software?
  • How they will be using it?
  • What is the required data to input?
  • What will be the output of the input data?
  • What is the purpose?
  • What skills are required?Will there be a need to hire new personnel or the current staff have the right skills and the capacity to work on this new project?

Find their answers. Is the project worth it? A thorough analysis is required here. There will be more questions that need to be answered before taking on this new project. All the work is documented for future reference.

Designing of the Software

Now comes the second phase, the designing of the software. On the basis of the documentation and the results of the first phase, the system and the software is given a design. From this, the developers comes to know the requirements of the hardware and system required to complete their new project. This phase will also define the system architecture. The designing phase will set the requirements for the next phase.

Coding or Programming

Here comes the role of the software developers. The system design documents are now divided into modules and the developers now start their job. This is going to be the longest phase of all. Programming is done here and it’s known to all that programming isn’t an easy job. It needs plenty of time, expertise and patience. Once done, the software developer sends their work to the tester.

Testing the Software

When in the production business, the quality of the product is always monitored and tested. So is the case with a software development. When the coding is done, the software developer sends their work to the Software Quality Assurance department /personnel. They will overlook the work of the software developers. The software quality assurance or the SQA for short will look for bugs and test the software. The test will be made as per the requirements and the guidelines mentioned in the requirements document. Unit testing, integration testing, system testing, acceptance testing is done by the SQA and if found deviations or errors, it’s sent back to the software developer. The procedures will keeps on repeating themselves until the software is bugs free and ready to deploy.

Deployment of the Software

On successful completion of the software and the testing, it is sent to the concerned client or is available to the public.

Maintaining the Software

Only the non-serious professionals or the ones not willing to carry on their business will not look back to their software but the serious developers will. Every software needs updating and maintenance. Whenever the software encounters some troubles, the software developing company will be there to fix it.

SDLC follows a simple procedure and it doesn’t require you to be a businessperson to know all the phases of SDLC. Every software developer and software developing company knows it all. So when hiring a software developing company you can rest assure that the procedure will be done in a professional way and the best product will be delivered.

Which Software Testing Company?

Software Testing Services

A key area to focus on when considering a software testing company is its software testers. Today there exists two popular certifications, ISEB and ISTQB. Try and ensure that the software testers at least hold these certifications at foundation level. Another factor with regards to software testers is the amount of experience they have. Many software testing companies state that there testers have five years I.T. experience. But reading between the lines, this simply means that they have five years experience anywhere in the field of Information Technology. You should really ask the software testing company, how many years professional software testing experience they actually have.

Many software testing companies offer a wide range of software testing services. Caution should be used though, as many of these companies will advertise these services but may not necessarily have the expertise to perform them. The types of software testing services that any professional company should offer is:

Test Case Creation

This very popular service typically involves creating detailed test cases that not only can be used on the project under test, but also due to their high quality can be re-used on future projects and form a high quality test documentation asset. Good testers will accumulate all required information necessary to produce the test cases, typically from design documentation, requirements and developer interview. Once the information has been analyzed a software tester will create a sophisticated excel spreadsheet which includes test cases, results sheets, environment setup and version details etc. Clients are involved in every stage of test case development in the form of a test case review process.

Functional Testing

Typical software products today include large amounts of critical functionality and complex features, added to this significant time pressures to get the product released make functional testing one of the most important stage of any software development. A software tester’s manual functional testing techniques have been proven to be highly effective at essentially determining whether or not the functionality actually works, or not. Versatile software testers can work from their own created test cases or use any pre-existing test cases you may already have. Good software testers readily use ad-hoc techniques when executing any tests to expand the test coverage. The aim during functional testing is to highlight any issues as early as possible so the developers can resolve it. This can obviously effectively reduce the development costs to your company.

Usability Testing

In order to ensure your software meets the needs of the end user; Usability Testing can be used. Not only will usability testing detect errors, but it will also detect navigational issues, language issues, workflow experience etc. Good software testers put themselves into the mindset of the end user and will report on the ‘look & feel’ of the software under test. Good software testers often build a set of test cases based upon real end user scenarios or business cases to ensure the software is tested in a similar way to how the real end users will actually use the software. This type of software testing has been proven to increase the ROI of software developments by enhancing the end user experience and therefore potentially increasing product sales. As usability testing is trying to ensure that the end user experience is appreciated, we perform this type of testing manually.

Regression Testing

Regression testing is surprisingly often overlooked area of software testing. This is often due to the assumption that when new functionality is working correctly then the software is ready for release. However, more often than not, additional issues have been introduced that affect existing functionality. Software testers have the knowledge and experience to identify existing test cases that are suitable for regression. Regression test cases are commonly functional test cases that are reused at regular intervals throughout the software development to ensure that the expected results remain consistent, thus providing confidence that nothing has been adversely affected by change.

Acceptance Testing

Acceptance testing is typically driven by the end user or customer. Acceptance test cases are normally executed by the customer prior to accepting the product. But commonly, these test cases are also given to the software developers to ensure their product meets the level of acceptance before the end of development. Software testers can perform execution of these test cases to highlight any issues to the development team as early as possible. Software testers can also derive expected acceptance test cases from customer requirements for you. On a smaller scale our software testers can also derive smoke tests to act as a form of acceptance tests during stages of the software development life cycle.

System Testing

System testing of software is testing conducted on a complete, integrated system to evaluate the system’s compliance with its specified requirements. Good software testers treat System testing as an investigatory testing phase, where the focus is to have almost a destructive attitude and will aim to test not only the design, but also the behavior and even the believed expectations of the customer. Software testers will It is also test up to and beyond the bounds defined in the software requirements specification. This is test that if a failure occurs, that it is handled correctly by the software with as little impact on the customer as possible.

Exploratory Testing

Commonly, while the software is being tested, a good software tester learns things that together with experience and creativity generates new good test cases to run. Good software testers consider exploratory testing to be an approach that can be applied to any test technique, at any stage in the development process. Software testers adopt the exploratory approach during all stages of testing. However, many software test teams use the exploratory testing approach during the final stages of a development just to allow a software testers to roam freely throughout the software focusing on areas of functionality that the software tester has a ‘gut feel’ where there may be issues. This approach can often detect defects that have previously not been considered in other ‘more formal’ areas of software testing.

Installation Testing

Installation testing is a type of software testing that focuses on what customers will need to do to install and set up the new software successfully. The testing process may involve full, partial or upgrades install/uninstall processes. Good software testers will typically perform installation testing when a compiled version of code has reached the final stages of testing or pre-production environment, from which it may or may not progress into final production. By the use of virtual machines, software testers can replicate many different operating systems and environments to fully test installation of software.