# TD-T01: Environment and dependencies

Adrian Sutherland · Version 1.0 · Refreshed September 2026

© 2005–2026 Adrian Sutherland.
Source page: https://architectureportal.org/assets/technology-deployment

Fictional cancellation service. Proposed design; checks are unrun.

## Purpose and requirements

TD-D1: evaluate a later case service preserving SI-C01 and SW-R1. Initial business trial remains process-only. No environment is deployed.

## Execution and state

TD-D1 proposes one application release and a durable transactional store. The notification relay could run as a worker from that release. Runtime, hosting, instance count and storage product remain open. Conditional acceptance must commit the case assignment, assignment history, accepted offer, operation result and pending notification together.

## Connections and access

Client calls authenticated case service. Case service controls accepted case records. Worker access limited to notification work; summary has no ownership-changing tool. Identity/network/keys require assigned operators. No credentials belong in this record.

## Demand and limits

Measure acceptance with concurrent reads, reconnecting clients and background notifications. Separate optional summary demand. Workload, latency, queue-age, storage growth and cost targets remain open.

## Operation and lifecycle

Assign application, platform, data, identity and network support. Record actual versions, support periods, licence and supplier terms when selected. TD-R1 restoration and TD-V1 replacement-environment checks remain unrun.

## Decision and evidence

Evaluate this modest arrangement before choosing isolation or scaling changes. Product selection depends on demonstrated transaction, restart, restore and capacity behaviour. No measured benefit claimed.