A linear sequence of operations (production steps), which are carried out after another, according to their operation numbers.

You use a single sequence to represent a simple linear series of production steps in production. If you want to represent a more complex series of production steps, you link several sequences with relationships to predecessors and successors.

A sequence contains a number of consecutive operations.

A sequence is subordinate to the routing header.

In the simplest case a routing only has one sequence, the standard sequence. Every other sequence is either an alternative or a parallel sequence, depending on whether its operations are performed as an alternative to the standard sequence or in parallel (at the same time) with the standard sequence. Only routings can have alternative sequences, parallel sequences can be created in both routings and rate routings.