> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/release-orchestration/3.0/examples-and-walkthroughs/multi-service-release-example.md).

# Multi-Service Release Example

This example demonstrates how to orchestrate a release involving multiple services with dependencies.

### Scenario <a href="#scenario" id="scenario"></a>

Release three services:

* **Service A**: Core service
* **Service B**: Depends on Service A
* **Service C**: Depends on Service A and B

### Process Design <a href="#process-design" id="process-design"></a>

#### Phase 1: Preparation <a href="#phase-1-preparation" id="phase-1-preparation"></a>

* Code freeze
* Branch creation
* Dependency validation

#### Phase 2: Build <a href="#phase-2-build" id="phase-2-build"></a>

Build all services in parallel:

* Build Service A
* Build Service B
* Build Service C

#### Phase 3: Integration Testing <a href="#phase-3-integration-testing" id="phase-3-integration-testing"></a>

* Deploy to integration environment
* Run integration tests
* Validate dependencies

#### Phase 4: Staging <a href="#phase-4-staging" id="phase-4-staging"></a>

* Deploy to staging
* User acceptance testing
* Approval required

#### Phase 5: Production <a href="#phase-5-production" id="phase-5-production"></a>

* Production approval
* Deploy Service A
* Deploy Service B (after A)
* Deploy Service C (after A and B)
* Post-deployment validation

### Key Features <a href="#key-features" id="key-features"></a>

#### Dependency Management <a href="#dependency-management" id="dependency-management"></a>

* Service B depends on Service A
* Service C depends on Service A and B
* Sequential deployment in production

#### Parallel Execution <a href="#parallel-execution" id="parallel-execution"></a>

* Build phase: Parallel builds
* Testing: Parallel where possible
* Production: Sequential deployment

### Related Topics <a href="#related-topics" id="related-topics"></a>

* [End-to-End Release Walkthrough](/release-orchestration/troubleshooting-and-resources/release-orchestration-use-cases/end-to-end-release-walkthrough.md)