Process Worker / System Steward

The binary that defines the labour transition in autonomous business design — a Process Worker performs tasks within a workflow; a System Steward governs the system that performs them. Arco builds businesses that require the latter and have designed out the need for the former.

A Process Worker is the standard unit of labour in a human-centric business. They receive tasks, execute them, and hand off the output to the next person in the chain. Their value is in the doing — volume of work processed, quality of individual outputs, speed of execution. The Process Worker's cost scales linearly with the business's output: more transactions require more Process Workers, more coordination between them, and more management overhead to keep them aligned. This is the mechanism behind the Coordination Tax.

A System Steward operates at a different architectural layer entirely. They do not perform tasks. They design the logic that performs tasks, monitor the system for deviation from expected behaviour, and resolve exceptions that fall outside the system's defined parameters. Their value is in the governing — the quality of the architecture they maintain, the speed with which they resolve novel exceptions, and the precision with which they update the system so that the same class of problem does not recur. The System Steward's cost does not scale with output volume. It scales with the frequency and complexity of novel exceptions — which decreases as the system matures.

First used: March 2026