The Decoy was initially planned as a short film based on a 35 page script. At the end of principal photography, they ended up with a 70-minute movie, mostly due to the amount of time needed to show the reactions of the main character, who is mute.
The initial plan was for a brief film stemming from a 35-page screenplay, however, the extensive time required to portray the silent protagonist's responses resulted in an extended feature-length movie.