What is the difference between "has to be" and "is to be"?
This is the example sentence: In case a diarization is desired, a proper XYZ algorithm is/has to be used.
I would like to point out, that my personal opinion is using the XYZ algorithm.
What is the difference between "has to be" and "is to be"?
This is the example sentence: In case a diarization is desired, a proper XYZ algorithm is/has to be used.
I would like to point out, that my personal opinion is using the XYZ algorithm.
"Is to be used" is grammatically acceptable but stylistically weak. Better to stick to one of these:
If the emphasis is on the necessity of using a proper XYZ algorithm, then use has to be used. An alternative is must be used. (Also consider if instead of in case.)
"Has to be used" is stronger than "is to be used."
"Has to" suggests a requirement, meaning that absolutely no other option is acceptable. "Is to" is a matter-of-fact future tense (similar to "will be used").
So it depends. If you feel that:
then use "has to." Otherwise, go with "is to."