Question $40$ of $50$

You work in a fast$-$food restaurant. For the lunch rush, the cooks make five versions of eac sandwich, placed in horizontal stacks. When there is only one sandwich left, the cashier $p$ sticky note on the top of the stack. This signals the cooks to make five new sandwiches. S sandwiches sell out very quickly, while others take more time. What type of system is this?

a push system

an empirical system

a kanban system

a scrum system