If inventories turn out to be lower than firms planned, then investment is less than planned investment.
If inventories turn out to be higher than firms planned, then investment is less than actual investment.
If inventories turn out to be lower than firms planned, then investment is greater than actual investment.
If inventories turn out to be lower than firms planned, then investment is greater than planned investment.
If inventories turn out to be higher than firms planned, then investment is greater than actual investment.