CONCEPT

  PURPOSE OR
     FUNCTION

 SCOUT TROOP

  FACTORY

DRUM

Sets the pace

Slowest scout

The Constraint

BUFFER

Protects the pace

Slack in the rope

Inventory in front of the constraint

ROPE

Enforces the pace

Rope tied between first scout and slowest scout

Some type of pull system, e.g., kanban type or OPT schedule