Software

In this post i,m going to tell you about the software and the phase of the software development.
Everyone in this world is using software for different but know one want to know what is the software and how it works. why we need software and how someone develop a software so first of all i,m going to tell you about the software.

What is a software ?

Computer software, or simply software, is a part of a computer system that consists of data or computer instructions, in contrast to the physical hardware from which the system is built.

this software is of any type either this is the software we use in machines or in vehicles or in our home appliances or in our computers, but for the computer software we have a specific definition.

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Computer software (often called just software) is a set of instructions and associated documentation that tells a computer what to do or how to perform a task or it can mean all the software on a computer, including the applications and the operating system.

Systems software includes the programs that are dedicated to managing the computer itself such as the operating system, file management utilities, and disk operating system . The operating system controls the computer hardware resources to add information to the application and the data.

Software Construction

Software construction is a software engineering discipline. It is the detailed creation of working meaningful software through a combination of coding, verification, unit testing, integration testing, and debugging.

This is the definition of the software construction which i,ll discuss in detail.
To construct a software first we need to collect the information of the software which we are going to develop a software. This phase is known as (SRS) or Requirement Engineering

Requirement's engineering:
Requirements engineering refers to the process of defining, documenting and maintaining requirements in the engineering design process.

Functional requirements:
Any requirement which specifies what the system should do.
In other words, a functional requirement will describe a particular behavior of function of the system when certain conditions are met, for example: “Send email when a new customer signs up” or “Open a new account”.

Non-functional requirements:
Any requirement which specifies how the system performs a certain function.
In other words, a non-functional requirement will describe how a system should behave and what limits there are on its functionality.

Example of the Non functional requirements
‎Accessibility · ‎
Usability
‎Availability
Maintainability
Dependent-ability
Computer performance

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REQUIREMENTS ENGINEERING PHASES:

Requirements elicitation:
requirements elicitation is the practice of collecting the requirements of a system from users, customers and other stakeholders.

Software Requirement Specification
A software requirements specification (SRS) is a document that captures complete description about how the system is expected to perform.

Requirements prioritization:
Requirements are also prioritized minimize risk during development so that the most important or high-risk requirements are implemented first.

Requirements validation:
It’s a process of ensuring the specified requirements meet the customer needs.

Software Requirements Specification Document

A Software Requirements Specification (SRS) is a document that describes the nature of a project, software or application. In simple words, SRS document is a manual of a project provided.

After completing this phase we move to the next phase in which we implement the specification we have gathered by Requirement engineering phase.

Implementation

In this step you have to implement you software for real means you have to code. You have to write program.

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i can,t code here so i leave it here for you.

This is the tough one. you have to write code in this phase.

Testing

After complete coding of your software you have to Test software. Testing is required for an effective performance of software application or product. It's important to ensure that the application should not result into any failures because it can be very expensive in the future or in the later stages of the development

There is three type of Testing

Unit Testing
Component Testing
System Testing

Unit Testing

In computer programming, unit testing is a software testing method by which individual units of source code, sets of one or more computer program modules together with associated control data, usage procedures, and operating procedures, are tested to determine whether they are fit for use.

Component Testing

Suppose, in an application there are 5 components.Testing of each 5 components separately and efficiently is called as component testing.Component testing is also known as module and program testing. It finds the defects in the module and verifies the functioning of software. Component testing is done by the tester.

System Testing

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System Testing is a level of the software testing where a complete and integrated software is tested. The purpose of this test is to evaluate the system's compliance with the specified requirements. Definition by ISTQB. system testing: The process of testing an integrated system to verify that it meets specified

After completing all the steps completely and successfully use software is now ready to use.

I hope it will help you alot in developing a software.

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