A requirement is generally the need of the client. This requirement or need will transform into a solution while taking various shapes and forms as it progresses from each stage of SDLC.
Requirements serve as the foundation of system components or systems. A requirement can be thought of something that is demanded or obligatory; a property that is essential for the system to perform its function. Requirements vary in intent and it’s kind of properties. Requirements can be functions, constraints or other elements that must be present to meet the need of the intended stakeholders. Requirements describes as a condition or capability a customer needs to solve a problem or achieve an objective.
Types of Requirements are as follows:
- Business Requirements–
Business requirements are high level statements of the goals, objectives or needs of the enterprise. Business requirements describes needs of the whole organization nor the groups or stakeholders within it. Business requirements are defined and developed through Enterprise analysis.
- Stakeholder Requirements–
Stakeholder requirements are statements of the needs of a particular stakeholder or class of stakeholders. They describe the need that is given stakeholder has and how that stakeholder will interact with a solution. Stakeholder requirements is bridge between business requirements and the various classes of solution requirements. These are developed and defined through Requirement analysis.
- Solution Requirements–
It describes the characteristics of solution that meet business requirements and stakeholder’s requirements. It can be developed and defined through Requirement analysis. They divided into two types.
- Functional Requirements-
It describes the behavior and information that the solution will manage. They describe capabilities the system will be able to perform in terms of behavior or operations.
- Non-Functional Requirements-
Non-functional requirements don’t directly relate to behavior or functionality of the solution, but rather describes environmental conditions under which the solution must remain effective like capacity, speed, security etc.
- Transition Requirements–
It describes the capabilities that the solution must have in order to facilitate transition from the current state of the enterprise to desired future state.
Difference between Requirements and Needs
|It’s a requirement or skill that a stakeholder needs in order to address an issue or accomplish a goal.||It is an abstract illustration of the specification. The goal or purpose is need.|
|The action we must take to fulfil a need are referred to as requirements.||The aims and objectives a corporation must attain are business needs.|
|There may be multiple requirements for a need.||It can be divided into more specific, lower-level needs.|
|More precise and thorough.||Less precise than requirements.|
|The needs have an impact on the requirements.||People’s thoughts and methods of making decision can have a significant impact on need.|
|Requirement is specific.||Lack of detail—the need is vague.|
|Requirement can be measured.||Needs cannot be measured.|