CheckTick Service Dependency & Impact Map

Last Reviewed: January 2026 Document Version: 1.1 Owners: CTO & SIRO

1. Key Operational Services

CheckTick provides the following primary service to health and care providers:

  • Clinical Survey Platform: An end-to-end digital service for collecting patient-reported outcome measures (PROMs) and clinical survey responses. This service is used by clinicians to monitor patient health and inform care decisions.

2. Technology & Service Dependencies

To remain available and secure, our operational services rely on the following third-party technologies:

Category Provider Purpose
PaaS / Orchestration Northflank Manages container deployment, scaling, and runtime.
Cloud Infrastructure AWS (London) Hosts the production PostgreSQL database (RDS).
Network & Security Cloudflare Provides WAF, DDoS protection, and DNS management.
Communication Mailgun Sends transactional notifications and clinician alerts.
Development GitHub Stores source code and manages CI/CD pipelines.
Identity Google/Microsoft Provides SSO and MFA for staff administrative access.

3. Operational Dependencies

Beyond technology, the following resources are required to maintain service continuity:

  • People: Availability of at least one Director (CTO or SIRO) with administrative access credentials to perform emergency system recovery.
  • Connectivity: High-speed internet access for staff to manage cloud environments via CLI/Web Console.
  • External Power & Cooling: CheckTick relies on the physical infrastructure of AWS (London Region) and Northflank's underlying providers. Both maintain high-availability data centers with redundant power (UPS/Generators) and cooling.
  • Data Integrity: Availability of the most recent database snapshots stored in AWS RDS.

4. Impact of Loss of Availability

We have assessed the impact of a service outage based on clinical and operational disruption.

Outage Duration Impact Category Detailed Impact Description
0 - 4 Hours Low Minimal disruption. Patients may experience a delay in submitting surveys. Clinicians may experience minor lag in receiving real-time data.
4 - 24 Hours Medium Moderate disruption to clinical workflows. Clinicians may need to revert to manual/paper backup methods for critical patient assessments.
24+ Hours High Significant disruption. Risk of data backlogs and potential delays in clinical care decisions if CheckTick is the primary data collection tool.

5. Review & Maintenance

This document is reviewed at least annually or following any significant change to our infrastructure or service delivery model.

  • Next Review Date: January 2027