1. Introduction and Goals

1.1 Requirements Overview

The Social Network is a web-based platform that enables users to:

• Create and manage personal profiles

• Follow other users and be followed back

• Post short-form content and read an aggregated timeline feed

• Send and receive direct messages and mentions

1.2 Quality Goals

Priority	Quality Goal	Scenario
1	Availability	The platform is accessible 99.9% of the time
2	Performance	Timeline feed loads in under 500 ms for up to 1 000 followees
3	Scalability	Handles 10 000 concurrent users without degradation
4	Security	User data and messages are accessible only to authorised parties
5	Maintainability	New features can be added within a single bounded context without touching others

1.3 Stakeholders

Role	Expectations
End User	Fast, reliable access to social features
Product Owner	Rapid feature delivery, clear domain boundaries
Developer	Clean architecture, well-defined APIs between bounded contexts
Operator	Observable system, straightforward deployment and scaling

1.4 System Context