What Is Requirement Analysis ?
Introduction:
Requirements assessment is a key phase in the software program development life cycle, focusing on the knowledge and documentation of what the software program is supposed to do and the constraints under which it must operate.
This section typically results in two key documents: the Customer Requirements Specification (CRS) and the Software Requirements Specification (SRS).
1. Customer Requirements Specification (CRS):
Purpose:
CRS captures the customer's needs and expectations from the software program product. It is written from the point of view of the consumer or end user and describes what the software should do from a business perspective.
Content:
- Introduction: Overview of the task, objectives and scope.
- Business Requirements: A detailed description of what the customer expects from the software program in terms of business goals.
- Functional Requirements: The high-level capabilities that the system should perform.
- Non-functional requirements: Performance, security, usability and other high quality attributes.
- Constraints: Limitations or regulations within which a software program should operate.
- User Profiles: Different forms of users and their interactions with the gadget.
- Acceptance criteria: Conditions that should be met in order for the product to be time-honored through the customer.
2. Software Requirements Specification (SRS)
Purpose:
The SRS provides a detailed and technical description of the software to be extended. Interprets high-stage buyer needs within CRS into defined and actionable specifications that developers can use.
Content:
Introduction:
- Purpose: Cause of SRS.
- Scope: The scope of the software program's mission.
- Definitions, Acronyms and Abbreviations: Explanation of phrases used in the SRS.
- References: Reference files and resources.
- Overview: SRS file structure.
General description:
- Product perspective: The context and environment where the product will operate.
- Product Functions: A summary of the main functions that the product must perform.
- User characteristics: Description of intended customers.
- Prerequisites and Dependencies: Prerequisites and dependencies that affect prerequisites.
Specific requirements:
- Functional requirements: A detailed description of all the properties that the device must meet.
- External interface requirements: Interfaces with other structures, hardware, software and communication interfaces.
- System properties: Specific functions that a system should have.
- Non-functional requirements: Performance, security, reliability and various attributes.
- System attributes: Constraints, compliance, and other attributes.
- Other requirements: Legal and regulatory requirements, if any.
Key steps in requirements analysis:
Invoke the request:
- Techniques: Interviews, surveys, workshops, notes, analysis of records.
- Objective: Collect comprehensive records from stakeholders.
Requirements documentation:
- Creating a CRS: Capturing buyer needs at a high level.
- Creating SRS: Translating excessive stage needs into characteristic specifications.
Request Verification:
- Reviewing requirements with stakeholders to ensure they are complete, clean and viable.
- Techniques: Tutorials, critiques, prototypes, and validation periods.
Request Management:
- Maintaining and processing requirements changes throughout the assignment lifecycle.
- Tools: Requirements management tools like JIRA, IBM Rational DOORS, etc.
Meaning of CRS and SRS:
- Clarity: Ensures that each client and builders have a clear and shared understanding of needs.
- Development Baseline: Provides a baseline against which the machine can be improved, tested and deployed.
- Scope Management: Helps to cope with project scope and control requirements changes.
- Contractual Agreement: May serve as a contractual settlement between the patron and the enhancement team.
By effectively engaging in requirements evaluation and expanding properly documented CRS and SRS, groups can reduce misunderstandings, scope creep, and mission risk, which is central to a more successful software program improvement method.