In the case of SIA, I believe that it has reached the economies of
scale ‘stage’ nearly a decade ago. The firm has been enlarging its fleet of
aircraft (part of ‘plants’ to the company) by leaps and bound, much to the
delight of its suppliers, Boeing and Airbus. Even though the price of fuel
has been rising steadily and been eating into the profits of most airlines,
SIA appears to be resilient and doing very well.