There is great importance in maintaining the continuity of the Torah reading.
There are disputes about the wording of prayers.
Several factors should be considered when determining the order of aliyot to the Torah
From Starter to Challah: Sourdough in Halacha by Refoel Gurevitch explores the application of Jewish law (Halacha) to sourdough bread-making practices. It details rules for incorporating sourdough into challah dough.