Police say there is nothing specific linking the case to foul play but after 17 days since Mr Plowright disappeared without a trace all possibilities must be considered.

The 20-year-old Hotel New York worker was last seen walking towards Perth's train tracks after leaving a small party on Arthur Street about 9.30pm on May 30.

A massive search operation involving hundreds of people turned up no clues on Saturday despite police being convinced he or his body were in the vicinity.

Police spent Monday visiting residences that were unable to be searched at the weekend when more than 1000 properties were scoured for clues.

Roads, tracks, railways and rivers within a five-kilometre radius of Perth have been combed.

One theory is that Mr Plowright, who was apparently affected by alcohol at the time, may have stumbled or fallen in an out-of-the-way area on the rural outskirts of Perth as he made his way to Launceston.

Northern inspectors and Commander Brett Smith will today meet and discuss what to steps to take next on the case.

Resources used so far have included the Tasmania Police helicopter, remote control drones, trail and quad bikes, horses, dogs, kayaks and scuba divers.

"In line with normal police procedure the investigation will be reviewed by the Northern CIB," a police statement said on Monday.

"Police do not believe that any criminal element is involved however all avenues must be explored."