An information technology asset management (ITAM) system tracks and manages hardware devices, software licenses, and related IT components throughout their lifecycle. It combines inventory, license management, and sometimes physical tracking with QR codes or barcodes. A centralized database records asset identifiers and attributes appropriate to each asset type. section 3.1
For hardware, useful records can include device type, model number, operating system, installed applications, purchase date, status, category, and funding details. For software, records can identify the application, vendor, available licenses, and installed computers. Tracking use helps prevent license overages, while knowing available assets can reduce unnecessary purchases and support consolidation, resale, and depreciation calculations. section 3.1 section 3.3
A hardware-focused design can grow from a core Asset model into operational concerns:
- Model Hardware as an Asset with FundingDetails and a selectable DepreciationStrategy, including straight-line, declining-balance, double-declining, or no depreciation. section 3.3
- Assign funding across multiple lines of business and calculate asset cost or total depreciation for a business line. section 3.3
- Connect purchasing, vendors, invoices, employees, departments, maintenance records, audit records, users, and roles as the scope expands. section 3.3
A pragmatic implementation shape
A proposed Python implementation exposes REST APIs through FastAPI, persists data with SQLAlchemy, and separates domain services from adapters using hexagonal architecture. Its project structure includes domain hardware and service modules, FastAPI and SQLAlchemy adapters, infrastructure configuration, and focused adapter and service tests. section 3.3
Listing 3.5 Relationships between the classes in our ITAM project
classDiagram
class MainApp
…
class AuditRecord
MainApp --> FastAPIAdapter : Uses
FastAPIAdapter --> HardwareService : Uses
HardwareService --> SQLAlchemyAdapter : Uses
SQLAlchemyAdapter "0..*" -- "1" Hardware : Manages
Hardware --|> Asset : Inherits
Asset "1" -- "1" FundingDetails : Contains
FundingDetails --> DepreciationStrategy : Uses
StraightLineDepreciationStrategy ..|> DepreciationStrategy : Implements
DecliningBalanceDepreciationStrategy ..|> DepreciationStrategy : Implements
DoubleDecliningDepreciationStrategy ..|> DepreciationStrategy : Implements
NoDepreciationStrategy ..|> DepreciationStrategy : Implements
PurchaseOrder --> Vendor : Links
Invoice --> PurchaseOrder : Links
Employee --> Department : Belongs
MaintenanceRecord --> Hardware : Links
SupportTicket --> Hardware : Links
Warranty --> Hardware : Links
Contract --> Vendor : Links
DisposalRecord --> Hardware : Links
User --> Role : Has
AuditRecord --> Asset : Links
Inspect the class relationships to review how adapters, hardware services, assets, funding details, depreciation strategies, and operational records fit together. section 3.3
Treat an initial design as a reviewable proposal, not a finished system. Document the architecture and business requirements so stakeholders can validate needs, raise objections, and approve the proposed direction before implementation proceeds. section 3.0 section 3.3
