Requirements Specification Template
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---
title: "Requirements Specification Template"
methodology: "universal"
complexity: "advanced"
owner: "mirichard"
updated: "2026-09-19"
primary_principles: ["quality-by-design", "systems-thinking"]
secondary_principles: ["stakeholder-engagement"]
principle_rationale: "Makes agreed software behavior, interfaces and nonfunctional constraints explicit enough to guide engineering and verification."
---
# Software Requirements Specification (SRS)
## When to Use
- During software planning when system behavior and constraints need a verifiable specification.
- When engineering and business stakeholders must agree interfaces and nonfunctional requirements.
## When NOT to Use
- To use a specification as technical design approval or test execution evidence.
- Do not use a completed template or example configuration as proof of fitness for the actual environment. See [Template as substitute for judgment](../../../../../docs/principles/anti-patterns.md#template-judgment).
## Pairs Well With
- [Business Requirements Document Template](../../../../../domains/measurement/project-lifecycle/02-planning/business-requirements/business_requirements_document_template.md).
- [Requirements Traceability Matrix Template](../../../../../domains/delivery/templates/traditional/Traditional/Process_Groups/Executing/requirements_traceability_matrix_template.md).
Selection context: Uncertainty domain; universal methodology; advanced complexity. Match the situations above to project phase, risk, team size, and industry using the [decision-engine context model](../../../../../meta/architecture-research/800-801-context-assessment-model.md).
Authentication examples require security-owner approval for the actual assurance level and user population. Use the current [NIST authentication guidance](https://pages.nist.gov/800-63-4/sp800-63b.html) when applicable and specify the chosen policy and verification tests.
**Document ID:** [SRS-PROJ-VERSION]\
**Version:** [1.0]
**Date:** [YYYY-MM-DD]
**Prepared by:** [Author Name(s)]
**Project:** [Project Name]
## Document Revision History
| Version | Date | Description of Change | Author(s) |
|---------|------|----------------------|-----------|
| 0.1 | [YYYY-MM-DD] | Initial draft | [Name] |
| 0.2 | [YYYY-MM-DD] | [Description of changes] | [Name] |
| 1.0 | [YYYY-MM-DD] | Approved version | [Name] |
## Table of Contents
1. [Introduction](#1-introduction)
1. [Purpose](#11-purpose)
2. [Scope](#12-scope)
3. [Definitions, Acronyms, and Abbreviations](#13-definitions-acronyms-and-abbreviations)
4. [References](#14-references)
5. [Overview](#15-overview)
2. [Overall Description](#2-overall-description)
1. [Product Perspective](#21-product-perspective)
2. [Product Functions](#22-product-functions)
3. [User Characteristics](#23-user-characteristics)
4. [Constraints](#24-constraints)
5. [Assumptions and Dependencies](#25-assumptions-and-dependencies)
3. [Specific Requirements](#3-specific-requirements)
1. [External Interface Requirements](#31-external-interface-requirements)
2. [Functional Requirements](#32-functional-requirements)
3. [Non-Functional Requirements](#33-non-functional-requirements)
4. [System Features](#34-system-features)
4. [System Interfaces](#4-system-interfaces)
1. [User Interfaces](#41-user-interfaces)
2. [Hardware Interfaces](#42-hardware-interfaces)
3. [Software Interfaces](#43-software-interfaces)
4. [Communications Interfaces](#44-communications-interfaces)
5. [Other Non-Functional Requirements](#5-other-non-functional-requirements)
1. [Performance Requirements](#51-performance-requirements)
2. [Safety Requirements](#52-safety-requirements)
3. [Security Requirements](#53-security-requirements)
4. [Software Quality Attributes](#54-software-quality-attributes)
6. [Appendices](#6-appendices)
---
## 1. Introduction
### 1.1 Purpose
> [Provide a brief statement of the purpose of this Software Requirements Specification (SRS). Identify the software product(s) to be produced by name and explain what the software will do.]
**Example:**
*This SRS document describes the functional and non-functional requirements for the Customer Relationship Management (CRM) System, version 2.0. This document is intended to be used by the members of the project team who will implement and verify the correct functioning of the system. Unless otherwise specified, all requirements specified here are high priority and committed for the CRM 2.0 release.*
### 1.2 Scope
> [Provide a brief description of the software being specified and its purpose. Describe the general nature of the software application. Define relevant benefits, objectives, and goals.]
**Example:**
*The CRM 2.0 system will replace the existing customer management system and will be used by the sales, marketing, and customer support departments. The system will manage customer information, track interactions, support marketing campaigns, and generate reports. The primary goal is to improve customer relationship management and increase sales efficiency by 25% within 6 months of deployment.*
### 1.3 Definitions, Acronyms, and Abbreviations
> [Provide definitions of all terms, acronyms, and abbreviations used in this document that might not be familiar to the reader.]
**Example:**
* **CRM** - Customer Relationship Management
* **UI** - User Interface
* **API** - Application Programming Interface
* **GDPR** - General Data Protection Regulation
* **SLA** - Service Level Agreement
* **2FA** - Two-Factor Authentication
### 1.4 References
> [List any documents or sources that were used or referenced when creating this document.]
**Example:**
1. Business Requirements Document for CRM System, v1.2, January 15, 2025
2. Current CRM System Documentation, v3.4, March 10, 2024
3. ISO/IEC/IEEE 29148:2018 - Systems and software engineering — Life cycle processes — Requirements engineering
4. Company Data Security Policy, v2.1, September 5, 2024
### 1.5 Overview
> [Provide a brief overview of the remainder of this document.]
**Example:**
*The remainder of this document contains a comprehensive description of the CRM 2.0 system. Section 2 provides a general overview of the product, its functions, and constraints. Section 3 details specific functional and non-functional requirements. Section 4 covers system interfaces, while Section 5 elaborates on additional non-functional requirements. Supporting information is provided in the appendices.*
## 2. Overall Description
### 2.1 Product Perspective
> [Describe the context and origin of the product. Is it a follow-on to existing systems? A replacement? A new, self-contained product? Describe how the software operates within various constraints.]
**Example:**
*The CRM 2.0 system is a replacement for the existing legacy CRM that has been in use for the past 7 years. The new system will interface with the existing ERP system, email marketing platform, and accounting software. It will be accessible via web browsers and mobile applications. The following context diagram illustrates the relationship between the CRM 2.0 system and its external entities:*
```
┌───────────────┐ ┌───────────────┐
│ Sales Team │─────▶│ │
└───────────────┘ │ │
│ │
┌───────────────┐ │ CRM 2.0 │ ┌───────────────┐
│ Marketing │─────▶│ System │─────▶│ ERP System │
│ Department │ │ │ └───────────────┘
└───────────────┘ │ │
│ │ ┌───────────────┐
┌───────────────┐ │ │─────▶│ Email │
│ Customer │─────▶│ │ │ Platform │
│ Support │ └───────────────┘ └───────────────┘
└───────────────┘
```
### 2.2 Product Functions
> [Provide a summary of the major functions that the software will perform. This should be a high-level summary only.]
**Example:**
*The CRM 2.0 system will provide the following major functions:*
* *Customer data management (contact information, history, preferences)*
* *Sales opportunity tracking and pipeline management*
* *Marketing campaign management and tracking*
* *Customer support case management*
* *Task management and reminders*
* *Reporting and analytics dashboard*
* *Email integration for communication tracking*
* *Mobile access for field sales representatives*
* *Integration with third-party systems (ERP, email marketing, accounting)*
* *User access control and permission management*
### 2.3 User Characteristics
> [Describe the general characteristics of the intended users of the product, including educational level, experience, technical expertise, and any other factors relevant to the design.]
**Example:**
*The CRM 2.0 system will be used by the following user groups:*
* *Sales Representatives (50 users): Field sales staff with varying levels of technical proficiency. Most have basic computer skills and will primarily use the system to log customer interactions and track sales opportunities.*
* *Sales Managers (10 users): Experienced with the current CRM system. Will use the system for pipeline management, forecasting, and team performance analysis.*
* *Marketing Staff (15 users): Technically proficient team that will use the system to manage campaigns, segment customers, and analyze marketing effectiveness.*
* *Customer Support Representatives (25 users): Full-time system users with moderate technical skills who will manage support cases and customer communications.*
* *Executives (5 users): Minimal direct interaction with the system, primarily accessing dashboards and reports. Limited technical experience.*
* *System Administrators (3 users): IT staff with advanced technical skills responsible for system configuration and maintenance.*
### 2.4 Constraints
> [Describe any constraints that could impact the development or operation of the system, such as regulatory policies, hardware limitations, interfaces to other applications, etc.]
**Example:**
*The development and implementation of the CRM 2.0 system is subject to the following constraints:*
* *Regulatory Compliance: The system must comply with GDPR, CCPA, and industry-specific data protection regulations.*
* *Technical Environment: The solution must be compatible with the company's existing Microsoft-based infrastructure and integrate with Office 365.*
* *Security Requirements: Must implement the company's security standards including data encryption, role-based access control, and audit logging.*
* *Implementation Timeline: The system must be fully operational by Q3 2025 to align with the company's digital transformation initiative.*
* *Budget Constraints: Development and implementation costs must not exceed the approved budget of $500,000.*
* *Browser Support: The web application must support the latest versions of Chrome, Firefox, Safari, and Edge browsers.*
* *Backward Compatibility: The system must provide an API for legacy applications that cannot be immediately migrated.*
### 2.5 Assumptions and Dependencies
> [List and describe any assumptions made and dependencies identified during the requirements analysis.]
**Example:**
*The following assumptions and dependencies have been identified:*
*Assumptions:*
* *Users will have continuous internet access when using the system.*
* *The average number of concurrent users will not exceed 75.*
* *The company's network infrastructure can support the increased data traffic.*
* *User departments will provide timely feedback during the testing phases.*
*Dependencies:*
* *Availability of APIs from the ERP system for real-time integration.*
* *Completion of the company-wide single sign-on (SSO) project by Q2 2025.*
* *Procurement and setup of additional server infrastructure by the IT department.*
* *Availability of subject matter experts from each department during the requirements validation phase.*
## 3. Specific Requirements
> [This section contains all the software requirements to a level of detail sufficient to enable designers to design a system to satisfy those requirements, and testers to test that the system satisfies those requirements.]
### 3.1 External Interface Requirements
#### 3.1.1 User Interfaces
> [Describe the logical characteristics of each interface between the software product and its users. Include usability requirements such as required screen formats, page layouts, content of any reports or menus, or availability of programmable function keys.]
**Example:**
*The CRM 2.0 system shall provide the following user interfaces:*
* *Dashboard Interface: Customizable dashboard with drag-and-drop widgets for different user roles. Must support at least 10 concurrent widgets per dashboard.*
* *Customer Profile View: Comprehensive 360-degree view of customer information including contact details, interaction history, open opportunities, support cases, and account status.*
* *Sales Pipeline Interface: Visual representation of the sales pipeline with drag-and-drop functionality for moving opportunities between stages.*
* *Reporting Interface: Interactive charts and graphs with filtering and drill-down capabilities.*
* *Mobile Interface: Responsive design for mobile devices with simplified views optimized for field use by sales representatives.*
*UI Mockups and wireframes are included in Appendix A.*
#### 3.1.2 Hardware Interfaces
> [Describe the logical and physical characteristics of each interface between the software product and the hardware components of the system. This may include the supported device types, the nature of the data and control interactions, and communication protocols.]
**Example:**
*The CRM 2.0 system shall support the following hardware interfaces:*
* *Barcode/QR Scanner Integration: Support for USB and Bluetooth barcode scanners for quick customer lookup at events and in the field.*
* *Printer Interface: Support for generating and printing reports, quotes, and customer communications through standard network printers.*
* *Mobile Device Support: Interface optimization for touchscreen operation on tablets and smartphones (iOS 14+ and Android 10+).*
* *Biometric Authentication: Support for fingerprint and facial recognition on devices that offer these capabilities for secure login.*
#### 3.1.3 Software Interfaces
> [Describe the connections between this software and other specific software components, including databases, operating systems, tools, libraries, and integrated commercial components. Identify the data items or messages coming into the system and going out and describe the purpose of each.]
**Example:**
*The CRM 2.0 system shall interface with the following software systems:*
* *ERP System Integration:*
* *Purpose: Synchronize customer accounts, orders, and financial information*
* *Interface Type: REST API with OAuth 2.0 authentication*
* *Data Flow: Bi-directional, with customer and order data flowing both ways*
* *Update Frequency: Near real-time with maximum 5-minute latency*
* *Email Marketing Platform:*
* *Purpose: Push contact lists and campaign performance metrics*
* *Interface Type: API-based integration using vendor's published SDK*
* *Data Flow: Primarily outbound for contact information, inbound for campaign metrics*
* *Update Frequency: Scheduled synchronization every 30 minutes*
* *Accounting Software:*
* *Purpose: Access invoice and payment information*
* *Interface Type: Database-level integration using read-only views*
* *Data Flow: One-way from accounting to CRM*
* *Update Frequency: Daily synchronization during non-business hours*
* *Single Sign-On (SSO) System:*
* *Purpose: Authenticate users and manage access control*
* *Interface Type: SAML 2.0 integration*
* *Data Flow: Authentication requests and responses*
* *Update Frequency: Real-time during user authentication events*
#### 3.1.4 Communications Interfaces
> [Describe the requirements associated with any communications functions required by this product, including email, web browser, network server communications protocols, etc. Define any pertinent message formatting. Identify any communication standards that will be used, such as FTP, HTTP, etc.]
**Example:**
*The CRM 2.0 system shall support the following communication interfaces and protocols:*
* *HTTP/HTTPS: System shall use HTTPS protocol for all web-based interactions, with TLS 1.3 or higher.*
* *Email Integration:*
* *SMTP for outgoing emails*
* *IMAP and POP3 for email synchronization*
* *Support for email authentication standards (SPF, DKIM, DMARC)*
* *WebSockets: For real-time notifications and updates to users without page refresh.*
* *WebRTC: For integrated voice/video communication features within the application.*
* *Mobile Push Notifications: For alerting mobile app users about important updates, using FCM for Android and APNS for iOS.*
* *Calendar Integration: CalDAV protocol support for synchronizing appointments with external calendar applications.*
### 3.2 Functional Requirements
> [Itemize the functional requirements of the system. These are the fundamental actions that must take place in the software in accepting and processing the inputs and in processing and generating the outputs. Use "shall" statements to express requirements.]
**Example:**
*The system shall provide the following functional capabilities:*
#### 3.2.1 Customer Management
*REQ-CM-01: The system shall allow users to create new customer records with mandatory fields including name, contact information, and customer type.*
*REQ-CM-02: The system shall enforce unique identifiers for customer records to prevent duplication.*
*REQ-CM-03: The system shall provide search functionality to find customer records using multiple criteria including name, location, industry, and custom fields.*
*REQ-CM-04: The system shall maintain a complete history of all changes made to customer records with timestamp and user information.*
*REQ-CM-05: The system shall support hierarchical customer relationships to represent parent-child organizational structures.*
#### 3.2.2 Sales Management
*REQ-SM-01: The system shall allow sales representatives to create and manage sales opportunities with detailed information including potential value, probability, and expected close date.*
*REQ-SM-02: The system shall provide a configurable sales pipeline with customizable stages reflecting the organization's sales process.*
*REQ-SM-03: The system shall calculate sales forecasts based on opportunity values, probabilities, and expected close dates.*
*REQ-SM-04: The system shall generate quotes and proposals using customizable templates populated with customer and opportunity data.*
*REQ-SM-05: The system shall track competitor information related to sales opportunities including win/loss analysis.*
#### 3.2.3 Marketing Management
*REQ-MM-01: The system shall support the creation and management of marketing campaigns with budget tracking and ROI calculation.*
*REQ-MM-02: The system shall provide customer segmentation capabilities based on multiple criteria for targeted marketing.*
*REQ-MM-03: The system shall track campaign responses and automatically associate them with the appropriate customer records.*
*REQ-MM-04: The system shall generate marketing analytics reports showing campaign effectiveness and customer engagement metrics.*
*REQ-MM-05: The system shall support lead scoring based on configurable criteria to prioritize follow-up activities.*
#### 3.2.4 Customer Support Management
*REQ-CSM-01: The system shall allow the creation and tracking of customer support cases with severity levels, categories, and SLA tracking.*
*REQ-CSM-02: The system shall provide an automated case routing system based on predefined rules including expertise, workload, and availability.*
*REQ-CSM-03: The system shall maintain a knowledge base of common issues and resolutions searchable by support staff and customers.*
*REQ-CSM-04: The system shall generate notifications and alerts for case updates, SLA violations, and escalations.*
*REQ-CSM-05: The system shall provide customer satisfaction tracking through post-resolution surveys and feedback mechanisms.*
#### 3.2.5 Reporting and Analytics
*REQ-RA-01: The system shall provide a customizable dashboard for different user roles showing relevant KPIs and metrics.*
*REQ-RA-02: The system shall allow users to create custom reports using a visual report builder without requiring technical knowledge.*
*REQ-RA-03: The system shall support scheduled report generation and distribution via email in multiple formats (PDF, Excel, CSV).*
*REQ-RA-04: The system shall provide trend analysis for key business metrics including sales performance, customer acquisition, and support volume.*
*REQ-RA-05: The system shall incorporate predictive analytics to forecast future sales, identify at-risk customers, and suggest next best actions.*
### 3.3 Non-Functional Requirements
> [Define all the non-functional requirements. These requirements can include performance, security, usability, regulatory, etc. Use "shall" statements to express requirements.]
#### 3.3.1 Performance Requirements
**Example:**
*REQ-PERF-01: The system shall support at least 100 concurrent users without performance degradation.*
*REQ-PERF-02: The system shall provide response times of less than 2 seconds for standard operations and less than 5 seconds for complex queries or reports under normal load conditions.*
*REQ-PERF-03: The system shall be able to process at least 1,000 transactions per minute during peak usage periods.*
*REQ-PERF-04: The database shall be capable of storing and efficiently retrieving records for at least 100,000 customers and 1 million customer interactions.*
*REQ-PERF-05: The system's search functionality shall return results in less than 3 seconds for queries against the entire customer database.*
#### 3.3.2 Security Requirements
**Example:**
*REQ-SEC-01: The system shall enforce user authentication using username/password combinations with optional two-factor authentication.*
*REQ-SEC-02: The system shall encrypt all sensitive data both in transit and at rest using industry-standard encryption methods (minimum AES-256 for data at rest, TLS 1.3 for data in transit).*
*REQ-SEC-03: The system shall implement role-based access control with granular permissions at the function and data level.*
*REQ-SEC-04: The system shall maintain an audit log of all security-relevant events including login attempts, permission changes, and access to sensitive data.*
*REQ-SEC-05: The system shall automatically lock user accounts after five consecutive failed login attempts, requiring administrator intervention for reactivation.*
*REQ-SEC-06: The system shall enforce the approved authentication policy, with explicit minimum length, compromised-password screening, rate limiting, and recovery requirements appropriate to the authentication method.*
#### 3.3.3 Usability Requirements
**Example:**
*REQ-USA-01: The system shall provide a consistent user interface across all modules following the company's UI/UX guidelines.*
*REQ-USA-02: The system shall be accessible to users with disabilities in compliance with WCAG 2.1 AA standards.*
*REQ-USA-03: The system shall provide context-sensitive help and tooltips for all functions and fields.*
*REQ-USA-04: The system shall allow users to customize their dashboard layout and saved views according to their preferences.*
*REQ-USA-05: The system shall support keyboard shortcuts for common operations to improve efficiency for power users.*
*REQ-USA-06: New users shall be able to complete basic tasks (create customer, log interaction, find information) with minimal training (less than 2 hours).*
#### 3.3.4 Reliability Requirements
**Example:**
*REQ-REL-01: The system shall have an uptime of at least 99.9% during business hours (excluding planned maintenance).*
*REQ-REL-02: The system shall perform automated data backups at least once every 24 hours with point-in-time recovery capabilities.*
*REQ-REL-03: The system shall be able to recover from failures with a Recovery Time Objective (RTO) of less than 4 hours and a Recovery Point Objective (RPO) of less than 1 hour.*
*REQ-REL-04: The system shall be capable of handling unexpected input without crashing or corrupting data.*
*REQ-REL-05: The system shall include fault tolerance mechanisms to prevent single points of failure from causing complete system outages.*
### 3.4 System Features
> [Describe the system features in more detail. This section can expand on the high-level functionality described earlier.]
**Example:**
#### 3.4.1 Customer 360-Degree View
*The system shall provide a comprehensive 360-degree view of each customer including:*
* *Basic profile information (contact details, company information, classification)*
* *Complete interaction history across all departments*
* *Current and historical sales opportunities*
* *Support case history and open issues*
* *Marketing campaign participation and responses*
* *Product ownership and subscription information*
* *Financial summary including lifetime value and payment history*
* *Relationship map showing connections to other customers or contacts*
*This feature shall present information in a tabbed interface with the ability to customize which information is displayed prominently based on user role.*
#### 3.4.2 Automated Workflow Engine
*The system shall include a visual workflow engine that allows administrators to create automated processes for common business scenarios including:*
* *Lead nurturing sequences*
* *Opportunity approval processes*
* *Customer onboarding workflows*
* *Support case escalation procedures*
* *Contract renewal notifications*
*The workflow engine shall support conditional branching, parallel processes, approval steps, automated actions, and integration with external systems through API calls.*
## 4. System Interfaces
### 4.1 User Interfaces
> [Describe the user interface components, including their purpose, features, and any specific requirements.]
**Example:**
*The CRM 2.0 system shall provide the following key user interface components:*
#### 4.1.1 Main Navigation
*The main navigation shall provide access to all major system modules through a consistent horizontal menu bar that includes:*
* *Dashboard*
* *Customers*
* *Sales*
* *Marketing*
* *Support*
* *Reports*
* *Admin*
*The navigation shall also include a quick search function that allows users to find records across all modules.*
#### 4.1.2 Dashboard
*The dashboard interface shall:*
* *Present a configurable grid layout with resizable widgets*
* *Support at least 15 different widget types (charts, lists, metrics, etc.)*
* *Allow users to save multiple dashboard configurations*
* *Provide filtering controls to adjust the data view*
* *Support real-time data updates without page refresh*
* *Include a global activity stream showing recent changes*
*Mock-up reference: See Appendix A, Figure 1*
### 4.2 Hardware Interfaces
> [Describe the hardware interfaces in detail, including the type of device, data exchange characteristics, and any specific protocols.]
**Example:**
*The CRM 2.0 system shall interface with the following hardware components:*
#### 4.2.1 Mobile Devices
*The system shall support mobile devices with the following characteristics:*
* *Screen sizes ranging from 5" to 12" diagonally*
* *Touch interface support with gesture recognition*
* *Camera access for document scanning and business card capture*
* *GPS integration for location-based customer insights*
* *Push notification capability for alerts and reminders*
* *Offline mode with data synchronization when connectivity is restored*
*The mobile interface shall adapt responsively to different screen sizes and orientations.*
### 4.3 Software Interfaces
> [Provide detailed information about the software interfaces, including the other software components being integrated with, data formats, command sequences, and error handling.]
**Example:**
#### 4.3.1 ERP System Integration
*The CRM 2.0 system shall integrate with the Oracle ERP system with the following interface characteristics:*
* *Connection Method: REST API with OAuth 2.0 authentication*
* *API Version: Oracle ERP Cloud API v2.0*
* *Authentication: Service account with least privilege access*
* *Data Exchange Format: JSON with UTF-8 encoding*
* *Integration Points:*
* *Customer master data synchronization (bi-directional)*
* *Order and invoice retrieval (one-way from ERP to CRM)*
* *Product catalog synchronization (one-way from ERP to CRM)*
* *Quote to order conversion (one-way from CRM to ERP)*
* *Error Handling:*
* *Retry mechanism for failed transactions (maximum 3 attempts)*
* *Error logging with notification to system administrators*
* *Reconciliation report for identifying and resolving synchronization issues*
* *Rate Limiting: Maximum 100 requests per minute to prevent API throttling*
### 4.4 Communications Interfaces
> [Describe the communications interfaces in detail, including protocols, ports, encryption, and other relevant details.]
**Example:**
#### 4.4.1 Email Communication Interface
*The CRM 2.0 system shall provide email communication capabilities with the following characteristics:*
* *Protocol Support:*
* *SMTP for outgoing mail*
* *IMAP and POP3 for email synchronization*
* *Microsoft Graph API for Microsoft 365 integration*
* *Gmail API for Google Workspace integration*
* *Authentication Methods:*
* *OAuth 2.0 for cloud email providers*
* *Username/password with secure storage*
* *API key authentication where applicable*
* *Email Features:*
* *HTML and plain text format support*
* *Template-based email creation with merge fields*
* *Attachment handling (up to 25MB total size)*
* *Email tracking (opens, clicks, replies)*
* *Automatic email logging to customer history*
* *Email threading and conversation views*
* *Security:*
* *TLS encryption for all email communications*
* *SPF, DKIM, and DMARC support for email authentication*
* *Content scanning for malware and sensitive information*
* *Performance:*
* *Support for bulk email operations (up to 10,000 recipients)*
* *Queuing system for reliable delivery*
* *Rate limiting to comply with email provider restrictions*
## 5. Other Non-Functional Requirements
### 5.1 Performance Requirements
> [Specify the performance requirements in detail, including response times, throughput, resource utilization, etc.]
**Example:**
*The CRM 2.0 system shall meet the following performance requirements:*
#### 5.1.1 Response Time
*REQ-PERF-06: The system shall provide the following maximum response times under normal operating conditions (defined as 70% of maximum system load):*
* *Simple data retrieval operations (single record): < 1 second*
* *List view operations with filtering: < 2 seconds*
* *Complex data retrieval (related records with joins): < 3 seconds*
* *Data modification operations (create, update): < 2 seconds*
* *Simple reports: < 5 seconds*
* *Complex reports with large datasets: < 30 seconds*
* *Dashboard loading with all widgets: < 4 seconds*
* *Search operations across all modules: < 3 seconds*
#### 5.1.2 Throughput
*REQ-PERF-07: The system shall support the following transaction volumes:*
* *Peak concurrent users: 100*
* *Average transactions per user per hour: 50*
* *Maximum transactions per second: 25*
* *Bulk import/export operations: 10,000 records per operation*
* *Email processing: 1,000 inbound emails per hour*
#### 5.1.3 Scalability
*REQ-PERF-08: The system architecture shall support horizontal scaling to accommodate user growth of 20% annually for the next 5 years without requiring application redesign.*
*REQ-PERF-09: The database design shall support efficient operation with the following projected data volumes after 5 years:*
* *Customer records: 250,000*
* *Contact records: 1,000,000*
* *Opportunity records: 500,000*
* *Activity records: 10,000,000*
* *Support case records: 1,000,000*
### 5.2 Safety Requirements
> [Specify any requirements related to safety, especially for systems that could potentially cause harm.]
**Example:**
*REQ-SAF-01: The system shall implement safeguards to prevent accidental deletion of customer records through a two-step confirmation process and temporary deletion staging.*
*REQ-SAF-02: The system shall provide clear warning messages before executing irreversible bulk operations that affect multiple records.*
*REQ-SAF-03: The system shall maintain an audit trail of all administrative actions that modify system configuration or security settings.*
### 5.3 Security Requirements
> [Provide detailed security requirements covering data protection, authentication, authorization, etc.]
**Example:**
#### 5.3.1 Data Protection
*REQ-SEC-07: The system shall protect all Personally Identifiable Information (PII) in compliance with GDPR, CCPA, and other applicable regulations through:*
* *Field-level encryption for sensitive data elements*
* *Data classification labels for all customer information*
* *Automated PII scanning and identification*
* *Data retention controls with configurable purge policies*
* *Privacy impact assessments for new features*
#### 5.3.2 Authentication and Authorization
*REQ-SEC-08: The system shall implement the following authentication controls:*
* *SAML 2.0 integration with the corporate identity provider*
* *Multi-factor authentication support*
* *Configurable password policies*
* *Session timeout after 30 minutes of inactivity*
* *Account lockout after 5 failed login attempts*
* *Risk-based authentication challenges for suspicious login attempts*
*REQ-SEC-09: The system shall implement the following authorization controls:*
* *Role-based access control with predefined roles*
* *Custom role definition capabilities*
* *Field-level security permissions*
* *Record-level access controls based on ownership and sharing rules*
* *Time-based access restrictions for temporary users*
* *Segregation of duties enforcement for sensitive functions*
#### 5.3.3 Audit and Compliance
*REQ-SEC-10: The system shall maintain comprehensive audit logs with the following characteristics:*
* *All authentication events (successful and failed)*
* *All authorization decisions (access granted and denied)*
* *All data modifications with before/after values*
* *All configuration changes*
* *All security-related administrative actions*
* *Export of sensitive information*
*REQ-SEC-11: Audit logs shall include the following information for each event:*
* *Timestamp with millisecond precision*
* *User identifier*
* *IP address and location*
* *Action performed*
* *Affected resource/record*
* *Result of the action*
### 5.4 Software Quality Attributes
> [Specify the quality attributes the software must possess, such as adaptability, availability, correctness, etc.]
**Example:**
#### 5.4.1 Availability
*REQ-QA-01: The system shall achieve 99.9% availability during business hours (8:00 AM to 8:00 PM local time, Monday through Friday) and 99% availability during non-business hours, excluding scheduled maintenance windows.*
*REQ-QA-02: Scheduled maintenance shall be limited to non-business hours and announced at least 48 hours in advance.*
*REQ-QA-03: The system shall be designed with redundancy to eliminate single points of failure for critical components.*
#### 5.4.2 Maintainability
*REQ-QA-04: The system shall be designed with a modular architecture that allows components to be updated independently.*
*REQ-QA-05: The system shall provide configuration capabilities that enable administrators to make common changes without requiring code modifications or vendor assistance.*
*REQ-QA-06: The system shall include comprehensive logging to facilitate troubleshooting and root cause analysis.*
#### 5.4.3 Portability
*REQ-QA-07: The web interface shall function correctly on the following browsers:*
* *Google Chrome (latest version and previous major version)*
* *Mozilla Firefox (latest version and previous major version)*
* *Microsoft Edge (latest version and previous major version)*
* *Apple Safari (latest version and previous major version)*
*REQ-QA-08: The mobile interface shall function correctly on:*
* *iOS devices (current version and previous major version)*
* *Android devices (current version and previous two major versions)*
#### 5.4.4 Usability
*REQ-QA-09: The system shall achieve a System Usability Scale (SUS) score of at least 80 in user testing.*
*REQ-QA-10: The system shall comply with WCAG 2.1 AA accessibility standards.*
*REQ-QA-11: The system shall provide a consistent user experience across all modules and functions.*
*REQ-QA-12: Common tasks shall be completable in 3 clicks or less from any main navigation point.*
## 6. Appendices
### Appendix A: User Interface Mockups
> [Include wireframes, mockups, or screenshots of the user interface design.]
### Appendix B: Data Dictionary
> [Provide a comprehensive list of data elements, their types, constraints, and descriptions.]
### Appendix C: Business Rules
> [Document business rules that affect the system behavior but are not explicitly stated in the requirements.]
### Appendix D: Use Case Specifications
> [Include detailed use case specifications that elaborate on the functional requirements.]
### Appendix E: Glossary
> [Provide a glossary of terms used throughout the document.]
---
## SRS Writing Guidelines
1. **Use Clear Language**: Write requirements in clear, concise language. Avoid ambiguity and vague terms like "user-friendly," "fast," or "efficient."
2. **Make Requirements Testable**: Each requirement should be verifiable through testing. If you can't test it, it's not properly specified.
3. **Use "Shall" Statements**: Express requirements using "shall" to indicate mandatory requirements. Use "should" for recommended but not mandatory items.
4. **Be Specific**: Include measurable criteria whenever possible. Instead of saying "The system shall respond quickly," say "The system shall respond within 2 seconds under normal load conditions."
5. **Uniquely Identify Requirements**: Give each requirement a unique identifier to facilitate traceability and reference.
6. **Avoid Compound Requirements**: Each requirement should express a single capability or constraint. Split compound requirements into multiple distinct requirements.
7. **Use Consistent Terminology**: Maintain consistent terminology throughout the document. Create and refer to a glossary to ensure everyone understands terms the same way.
8. **Include Rationale When Helpful**: For complex or potentially controversial requirements, include a brief rationale explaining why the requirement exists.
9. **Specify Constraints Separately**: Clearly distinguish between what the system should do (functional requirements) and constraints on how it should do it (non-functional requirements).
10. **Involve Stakeholders**: Ensure relevant stakeholders review the requirements to confirm they accurately reflect the needs and expectations.