Enterprise Application Infrastructure Requirements

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Business Context & Governance

Application type? (ERP, CRM, HR system, financial application)
Business criticality level? (mission-critical, business-critical, standard)
Regulatory compliance? (SOX, GDPR, HIPAA, PCI-DSS, industry-specific)
Geographic presence and data residency requirements?
Integration with existing enterprise systems?
Change management and approval processes?

Application Architecture

Application stack? (.NET, Java EE, SAP, Oracle, custom)
Database requirements? (Oracle, SQL Server, DB2, PostgreSQL)
Middleware needs? (message queues, application servers, ESB)
Legacy system integration requirements?
Single sign-on (SSO) integration? (Active Directory, SAML, LDAP)
Multi-tier architecture requirements?

User Base & Access Patterns

Number of concurrent users? (internal employees, external customers)
User distribution? (headquarters, branch offices, remote workers)
Peak usage periods? (business hours, month-end, seasonal)
Mobile access requirements?
Offline capability needs?
User role complexity and permissions?

High Availability & Disaster Recovery

RTO (Recovery Time Objective) requirements?
RPO (Recovery Point Objective) requirements?
Multi-region deployment needs?
Backup frequency and retention requirements?
Disaster recovery testing requirements?
Business continuity requirements during maintenance?

Security & Compliance

Data classification levels? (public, internal, confidential, restricted)
Encryption requirements? (at rest, in transit, key management)
Network segmentation requirements?
Privileged access management needs?
Audit logging and retention requirements?
Vulnerability scanning and patching requirements?

Performance & Scalability

Response time requirements? (sub-second, seconds, minutes)
Transaction volume? (per hour, per day)
Batch processing requirements?
Seasonal scaling needs?
Database performance requirements? (IOPS, throughput)
Caching strategy requirements?

Budget & Licensing

Capital vs operational expenditure preferences?
Software licensing considerations? (BYOL, included licenses)
Cost allocation requirements? (by department, cost center)
Reserved capacity vs on-demand preferences?
Multi-year budget planning requirements?