Asupplier of instrument gauge clusters uses a kanban system to control material flow. the gauge cluster housings are transported five at a time. a fabrication centre produces approximately 10 gauges per hour. it takes approximately two hours for the housing to be replenished. due to variations in processing times, management has decided to keep 25 percent of the needed inventory as safety stock. how many kanban card sets are needed?

Where are the calculations?

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.