Vertical microcode can be considered to be a segment of code or operators that have been clubbed together into fields. In this field every micro operation is given a unique value.

This helps in efficient organization of related code together.
An effective design strategy could be in case of 2 micro operations occurring at the same state, to assign them two different fields.
A no operation NOP can be included in each field if necessary.
The remaining micro operations can be distributed among the other operation field bits.
Also micro operations that modify the same registers could be grouped together in the same field.   _{Your Comment}