Definition
An operation is a single, distinct manufacturing step performed on a part, such as a specific milling operation, a turning pass, or a drilling cycle, typically on one machine without repositioning. A routing is built from an ordered sequence of operations.
Why operation count matters as much as operation complexity
The number of operations a part requires, more than any single operation's complexity, often drives total cost, since each operation typically carries its own setup and handling overhead on top of its cutting time.
Where operations come from
Not on the drawing directly; the number and type of operations needed follow from the manufacturing features and requirements a part specifies.
Common mistakes
Underestimating how many separate operations a seemingly simple part actually requires, especially when features need different tools, orientations or processes.
The number of operations a part requires, more than any single operation's complexity, often drives total cost, since each operation typically carries its own setup and handling overhead on top of its cutting time.
See how Blake reviews a partFrequently asked questions
Is an operation the same as a setup?
Related but distinct; a setup is a specific positioning of the part, and one setup can contain multiple operations if they don't require repositioning.
What determines how many operations a part needs?
The number and type of manufacturing features, and which of them can be grouped into the same operation using the same tool and setup.
Does operation count directly equal cost?
Not directly, but each operation typically adds its own overhead, so more operations generally means more cost even if total cutting time is similar.