precision, speed, and scalability.
Udacity’s primary concern was with transcription and caption accuracy. Udacity required an impeccable standard to support a cross-section of student, including those who prefer to learn by reading, those who are non-native English speakers, and students with disabilities, particularly those with hearing impairments.
Udacity’s secondary concern was speedy service. This was critical because of the high number of videos created that require transcription and captioning.
Udacity serves millions of students and has high standards for quality at scale. They were looking to minimize the incremental cost of video transcription, while simultaneously increasing quality, in order to serve students globally.