An example i have worked on is:
Kanban board is used in manufacturing industry as a scheduling system for lean manufacturing and to facilitate the demand - supply flow correctly. The Kanban cards arranged in a Kanban board intimate the on ground working staff to plan the work as per the demand - the quantity required and running status of production.
Planning of Kanban board is mainly influenced by factors such as:
1. Customer demand
2. Adequate stock in hand (inventory) required
3. Accommodate sudden spikes in demand of particular variant of product
There is different types of Kanban cards used to facilitates the production work on shop floor:
1. Conveyance Kanban cards: to alert people when part is finished in one area and the part is ready to be moved for second stage processing
2. Emergency Kanban cards: when a defect is observed in one or series of product it is used to alert the team working on that stage about the defect to eliminate the defect in current lot of product
3. Express Kanban card: to indicate the shortage of particular part in one area and to be supplied on faster pace
4. Production Kanban cards: to indicate all the type of parts (product variants) required at the particular time and marks the start of production for the product
Kanban board has various other representation as well and can be used to include lot more information than i could explain in the answer. Now days, organisation are even implementing digital Kanban boards and RFID based Kanban cards to track production more efficiently and effectively.