The previous leaf spring model has three key components (Blades, Bushings, and Clamps) that are the same for the new leaf spring, which are managed with a Push system, based on the following historical data: the probability of having each component in stock is SLBlades =0.77, SL_Bushes =0.82, SL_Clamps = 0.87.

Combining components in an order	Frequency of orders
Leaves	0.2
Bushings	0.18
Clamp	0.15
Leaves, Bushings	0.1
Leaves, Clamp	0.1
Bushings, Clamp	0.1
Blades, Bushings, Clamp	0.2
	1.0

Annual sales for each component are 342,000 and maintaining a component costs approximately 18.5% of the annual cost.

Component	Cost per piece	Inv. Average
Leaves	$205.00	5,790
Bushings	$75.00	2,150
Clamp	$45.00	4,050

Calculate:

a) Average Weighted Service Rate (TPSP) KPI for all three components.

b) The inventory rotation of each component.