DAX aggregation help

[jake32008]

I am trying to calculate production capacity and have the following inputs:

Product Group - overall capacity is limited by the bottleneck process
Process
Machine
Product Type - some processes have machines have varying capacity depending on product type
Production Shift

GROUPING	CALCULATION	EXAMPLE	QUANTITY
PRODUCT GROUP	MIN	PRODUCT GROUP A	300
PROCESS	SUM	PROCESS 1	300
MACHINE	MIN	Machine 1	300
PRODUCT TYPE	SUM	(blank)	300
PRODUCTION SHIFT		(blank)	300
PROCESS	SUM	PROCESS 2	450
MACHINE	MIN	Machine 1	175
PRODUCT TYPE	SUM	(blank)	175
PRODUCTION SHIFT		First	50
PRODUCTION SHIFT		Second	75
PRODUCTION SHIFT		Third	50
MACHINE	MIN	Machine 2	275
PRODUCT TYPE	SUM	(blank)	275
PRODUCTION SHIFT		First	100
PRODUCTION SHIFT		Second	50
PRODUCTION SHIFT		Third	125
PROCESS	SUM	PROCESS 3	500
MACHINE	MIN	MACHINE 1	250
PRODUCT TYPE	SUM	Type A	250
PRODUCTION SHIFT		(blank)	250
MACHINE	MIN	MACHINE 2	250
PRODUCT TYPE	SUM	Type A	350
PRODUCTION SHIFT		(blank)	350
PRODUCT TYPE	SUM	Type B	250
PRODUCTION SHIFT		(blank)	250

<colgroup><col><col><col><col></colgroup><tbody>
</tbody>

I have tried using the following formula which aggregated correctly at the machine level but not at the product group level:

production capacity:=SWITCH(TRUE(),
HASONEVALUE(production_capacity[product group]), MIN(production_capacity[capacity]),
HASONEVALUE(production_capacity[process]), SUM(production_capacity[capacity]),
HASONEVALUE(production_capacity[machine]), MIN(production_capacity[capacity]),
HASONEVALUE(production_capacity[product_type]), SUM(production_capacity[capacity]),
SUM(production_capacity[capacity]))

What am I missing here? Thank you in advance for any help.

Jake