System Context Architecture

Auteur
Affiliations

[Author Name]

Université de Toulon

LIS UMR CNRS 7020

Date de publication

2026-10-03

Purpose of this Document

This document defines the system boundaries, key external interfaces, and overall context of the [System Name] system. It serves as the foundation for more detailed architecture views.

System Overview

System Name: [Full system name]
System Type: [SaaS|Mobile|Enterprise|IoT|etc.]
Business Domain: [Domain area]
Scale: [Users/transactions/data volume/etc.]
Criticality: [Mission critical|Business critical|Supporting|etc.]
Architecture Style: [Microservices|Monolithic|Event-driven|etc.]

System Context Diagram

graph TD
    subgraph "System Boundary"
        A[Core System] --- B[Component 1]
        A --- C[Component 2]
    end
    
    D[External System 1] --- A
    E[External System 2] --- A
    F[User Type 1] --- A
    G[User Type 2] --- A

Alternative Diagram (C4 Model Style)

@startuml
!include <C4/C4_Context>

Person(user, "Primary User", "Core system user")
Person(admin, "Administrator", "System administrator")

System_Boundary(sys, "System Boundary") {
    System(core, "Core System", "Main functionality")
    System(api, "API Layer", "Integration point")
    System(data, "Data Store", "Persistence")
}

System_Ext(ext1, "External System 1", "Integration")
System_Ext(ext2, "External System 2", "Integration")

Rel(user, core, "Uses")
Rel(admin, core, "Administers")
Rel(ext1, api, "Uses", "Protocol")
Rel(api, core, "Routes")
Rel(core, data, "Persists")
Rel(core, ext2, "Calls")
@enduml

Key Stakeholders

Role Responsibilities Contact
[Role] [Key responsibilities] [Contact info]
[Role] [Key responsibilities] [Contact info]

Technical Specifications

Integration Points:
  Inbound:
    - Protocol: [REST/GraphQL/gRPC/SOAP/etc.]
      Volume: [requests/second]
      SLA: [Response time/availability/etc.]
      Security: [Authentication mechanism]
    - Protocol: [Second protocol if applicable]
      # Add details as above
  
  Outbound:
    - System: [External system name]
      Protocol: [Integration protocol]
      Purpose: [Why we integrate]
      Criticality: [Critical/Important/Optional]
      SLA: [Required service level]

System Constraints:
  Performance:
    - Throughput: [Target metrics]
    - Latency: [Target metrics]
    - Concurrency: [Target metrics]
  
  Scalability:
    - Growth: [Expected growth rate]
    - Peak Load: [Peak metrics]
    - Scaling Strategy: [Horizontal/Vertical/Both]
  
  Compliance:
    - Standards: [Required standards]
    - Regulations: [Applicable regulations]

Architecture Decisions

Key Decisions:
  - Decision: [architectural pattern choice]
    Rationale: [Technical and business reasons]
    Impact: [Scope and implications]
    Alternatives: [What was considered but rejected]
  
  - Decision: [technology stack choice]
    Rationale: [Technical and business reasons]
    Constraints: [Limitations this creates]
    Risks: [Potential issues]

Evolution & Roadmap

Timeframe Changes Drivers Status
Current [Current state] [N/A] [Active]
Short-term (1-3 months) [Planned changes] [Business/technical drivers] [Planned]
Medium-term (3-6 months) [Roadmap items] [Business/technical drivers] [Proposed]
Long-term (6+ months) [Strategic direction] [Business/technical drivers] [Vision]

System Boundaries

Internal Components:
  - Component: [Component 1]
    Purpose: [Primary responsibility]
    Owner: [Team or individual]
    Status: [Active/In development/Planned]
  
  - Component: [Component 2]
    # Add details as above

External Dependencies:
  Critical:
    - System: [External system 1]
      Purpose: [Integration purpose]
      SLA: [Required service level]
      Integration: [How we integrate]
      Owner: [External team/company]
      Fallback: [Contingency if unavailable]
  
  Non-Critical:
    - System: [External system 2]
      # Add details as above

Risk Assessment

Risk Impact Likelihood Mitigation
[Risk description] [High/Medium/Low] [High/Medium/Low] [Mitigation strategy]
[Risk description] [High/Medium/Low] [High/Medium/Low] [Mitigation strategy]

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