Orchestration · Software component

Role-Based Task Orchestrator

Software componentOrchestrationOrchestration & Toolsarc:SequentialTaskCoordinator

A workflow orchestrator that executes predefined tasks assigned to role-defined agents, either sequentially with task-output context inheritance or hierarchically through a manager agent that delegates and reviews.

Responsibility. Executes role-assigned tasks in sequential or hierarchical process order.

Also known as: Crew process, Role-based team orchestration, Sequential process, Sequential crew, Task pipeline, Role-Based Task Orchestrator, Sequential agent handoffs

Variant of Multi-Agent Coordinator abstract

When to choose. Choose when the workflow mirrors an organisational structure with clear roles, predictable task dependencies and sequential or hierarchical delegation; avoid for dynamic workflows needing conditional branching or iterative self-correction loops.

Direct neighbourhood (hover for relationship types)

Relationships

reads dependency

Task Definition Ch2.4

orchestrates control

Supervisor Agent Ch2.1
Worker Agent abstract Ch2.1 Ch3.10

alternative to variability

Design guidance

SHOULD NOT encode iteration into task descriptions for refinement loops; such workflows belong in a graph-based orchestrator.
SHOULD be used only when task order is fixed; it offers no way to request additional upstream work without re-running the workflow.

Quantitative guidance

As stated by the sources; verify before use.

Supply chain: three sequential agents consumed 9,200 tokens and 15 API calls per order through context restatement (Ch3.10).

Classification

Patterns: Sequential processHierarchical processTask context inheritanceRole-based teamAutomatic context passing
Technologies: CrewAICrewAI Process.sequential
Quality attributes: Explainability (NIST AI RMF: explainable and interpretable)Interaction capability (ISO/IEC 25010)Reliability (ISO/IEC 25010 | NIST AI RMF: valid and reliable)Maintainability (ISO/IEC 25010)
Risks mitigated: Out-of-order execution of dependent tasks

Sources

Ch2.1: T. Nguyen, "Framework Landscape and Selection," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 2.1. ISBN: 9798244538229.
Ch2.4: T. Nguyen, "Multi-Agent Frameworks," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 2.4. ISBN: 9798244538229.
Ch3.10: T. Nguyen, "Efficiency Metrics," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 3.10. ISBN: 9798244538229.