Sentence examples similar to operation is optional from inspiring English sources

The re-ending/decoding operation at intermediate nodes is optional.

They cover the cases: The operation of node C is optional and not absolutely required for measuring node A, but would improve the result of the measurement.

Their use is optional.

Sensitivity is optional.

Digitization is optional.

Sugar is optional.

Cutlery is optional.

Sex is optional".

"All else is optional").

Makeup is optional.

Smirking is optional.