> ## Documentation Index > Fetch the complete documentation index at: https://docs.freyavoice.ai/llms.txt > Use this file to discover all available pages before exploring further. # Workflows > Building complex call routing and processing logic with visual workflows ## What Are Workflows? Workflows are visual, node-based systems that allow you to create sophisticated call routing and processing logic. They enable you to build applications that go beyond what a single agent can accomplish, combining multiple agents, conditional logic, function calls, and integrations. ## Workflow Components ### Nodes Nodes are the building blocks of workflows. Each node represents a specific action or decision: **Agent Nodes**: Connect to AI agents to handle conversations. You can use different agents for different parts of the workflow. **Function Nodes**: Execute custom functions or API calls. These can fetch data, update systems, or trigger external actions. **Condition Nodes**: Route calls based on conditions. Conditions can check time of day, caller information, conversation state, or any other data. **Transfer Nodes**: Transfer calls to human agents or external systems. This enables human-in-the-loop scenarios. **Wait Nodes**: Pause execution for a specified duration. Useful for delays or scheduled actions. **Loop Nodes**: Repeat actions based on conditions. Enable iterative processing or retry logic. ### Connections Connections define the flow between nodes: **Sequential Flow**: Standard connections that execute nodes one after another. **Conditional Flow**: Connections that branch based on node outputs or conditions. **Parallel Flow**: Multiple paths that can execute simultaneously. **Loop Flow**: Connections that create loops for iterative processing. ### Variables Variables store and pass data between nodes: **Input Variables**: Data that enters the workflow, such as caller information or initial context. **Node Outputs**: Data produced by nodes that can be used by subsequent nodes. **Global Variables**: Variables accessible throughout the workflow. **Type Safety**: Variables have types (string, number, boolean, object) to ensure data integrity. ## Workflow Design Patterns ### Simple Routing The simplest workflow pattern routes calls to a single agent: ``` Start → Agent Node → End ``` This is equivalent to using an agent directly but provides a foundation for expansion. ### Conditional Routing Route calls based on conditions: ``` Start → Condition Node → [True Path] → Agent A → [False Path] → Agent B ``` Common conditions include: * Time of day (business hours) * Caller ID or phone number * Language preference * Customer type or segment ### Multi-Agent Handoff Pass calls between multiple agents: ``` Start → Agent A (Initial Greeting) → Condition → Agent B (Support) → Agent C (Sales) ``` Each agent handles a specific part of the conversation, with smooth handoffs between them. ### Human Escalation Escalate to human agents when needed: ``` Start → Agent → Condition (Needs Human?) → Transfer to Human → Continue with Agent ``` The agent can detect when human intervention is needed and seamlessly transfer. ### Function Integration Integrate with external systems: ``` Start → Function (Fetch Customer Data) → Agent (Uses Data) → Function (Update System) → End ``` Functions can fetch data before conversations, update systems during calls, or trigger actions after calls. ### Parallel Processing Execute multiple operations simultaneously: ``` Start → [Function A] ┐ [Function B] ├→ Agent (Uses Both Results) [Function C] ┘ ``` Parallel execution improves performance when operations are independent. ## Building Workflows ### Planning Your Workflow Before building, plan: **Goal**: What should the workflow accomplish? Define clear success criteria. **Flow**: Map out the logical flow of the conversation or process. **Decisions**: Identify decision points and conditions. **Integrations**: Determine what external systems need to be involved. **Error Cases**: Plan how to handle errors and edge cases. ### Creating Nodes **Add Nodes**: Add nodes from the node palette to your workflow canvas. **Configure Nodes**: Set node properties including which agent to use, what function to call, or what condition to check. **Name Nodes**: Use descriptive names that make the workflow self-documenting. **Organize Visually**: Arrange nodes logically to show flow clearly. ### Connecting Nodes **Create Connections**: Connect nodes by dragging from output to input. **Set Conditions**: For conditional connections, define the conditions that determine which path to take. **Test Connections**: Verify that connections work as expected. **Handle Loops**: Be careful with loops to avoid infinite execution. ### Testing Workflows **Simulation**: Test workflows in simulation before connecting to real phone numbers. **Test All Paths**: Ensure all conditional paths are tested. **Test Edge Cases**: Test error conditions and edge cases. **Monitor Execution**: Watch workflow execution to identify issues. ## Advanced Workflow Features ### State Management **Workflow State**: Workflows maintain state throughout execution. **Variable Persistence**: Variables persist across nodes and can be accessed throughout the workflow. **State Transitions**: Define how state changes as the workflow progresses. ### Error Handling **Error Nodes**: Add error handling nodes to catch and handle failures. **Fallback Paths**: Define fallback paths when primary operations fail. **Error Logging**: Log errors with sufficient context for debugging. **User Communication**: Communicate errors to users in helpful ways. ### Performance Optimization **Minimize Nodes**: Each node adds processing time. Keep workflows efficient. **Use Parallel Processing**: Execute independent operations in parallel. **Cache Results**: Cache expensive function results when appropriate. **Optimize Conditions**: Place most common conditions first. ## Workflow Best Practices ### Organization **Keep Workflows Focused**: Each workflow should have a clear, single purpose. **Use Descriptive Names**: Name workflows and nodes clearly. **Document Complex Logic**: Add comments for complex routing logic. **Version Control**: Keep versions of workflows for easy rollback. ### Error Handling **Plan for Failures**: Always include error handling. **Provide Fallbacks**: Design fallback paths for critical operations. **Log Errors**: Ensure errors are logged with context. **User-Friendly Messages**: Provide helpful error messages to users. ### Testing **Test Thoroughly**: Test all paths and conditions. **Use Simulation**: Always test in simulation first. **Monitor Production**: Closely monitor workflows in production. **Iterate Based on Data**: Improve workflows based on real usage data. ## Next Steps Learn how to manage phone numbers and connect them to your agents and workflows.