Xadrian uses an algorithm which concentrates on keeping the number of factories as low as possible. This can result in a slightly higher resource surplus compared to other complex calculators which may use a different algorithm. In most cases this is a good thing. Fewer factories means a lower total price and slightly higher surplus means that the storages are filled in less time and the complex can run smoother. In some cases the resulting complex is slightly more expensive but remember that you have to build less factories which means spending less time. And time is money.
