In Adhania, the bricks would be fired in small batches of ten to hundred pieces in tiny furnaces.
This was because the rulers of his country never bothered to industrialize brick production.
One, because it was a somewhat capital-intensive process, and two, more importantly, because they were rich enough to afford stone.
Hence bricks were relegated to the sidelines, only produced by poor individuals who usually produced them for their personal kilns using small homemade furnaces.
Alexander let these micro kilns operate for the first few weeks to get the workers used to the brick-making process and also because he needed the initial building material.
But he had little idea the production rate would be so abysmal, and hence decided not to wait any longer and chose the commencement of the dome kiln.
His current design of the kiln was capable of producing 20,000 pieces of bricks a day, and according to his calculations, these bricks would be far cheaper than stone.