Mounting pressure on suppliers for price cuts comes as Airbus and Boeing are raising production of their single-aisle models to around 50 aircraft a month each, up from 42 a month, and pondering a further step-up to 60 a month.
Refer to the input text as context and select the correct relationship between 'Airbus' and 'aircraft' from the available options.
Options: product/material produced, operator, publisher, original broadcaster