Final answer:
In a Kanban system, signals such as containers, cards, and colored golf balls can be used to indicate the progress of work and control the flow of tasks.
Step-by-step explanation:
In a Kanban system, signals are used to indicate the progress of work and control the flow of tasks. The signals that could be used include:
- Containers that identify the next production step: These containers can be labeled to indicate the next production step. This helps workers to know which step to take the item to next.
- Cards to mark product movement: Cards can be used to track the movement of products throughout the production process. These cards can contain information about the product and its current location.
- Colored golf balls: Colored golf balls can also be used as signals in a Kanban system. Each color can represent a different type of product or task, helping to visually communicate the status of work.
Therefore, the correct options are a) 1 and 2 since both containers and cards can be signals in a Kanban system.