Blackwarder
Adventurer
Several options:
Use the marching order guidelines, if a character from the back of the passage want to go to the front and listen to the door, and than another one want to do so and so on they are bound to make some noise, make them do a stealth check. Also who is keeping watch when everyone is so intent on the door? How long would it take for each character to listen? I go with about a minute-per-character to be certain, sometime more, depending on the situation.
Another thing I like doing is rolling for the PC behind the screen, that way he have no idea if he succeded or failed.
As for searching the room, throughly searching a 10x10 room should take a character about 5 minute (again varied by the situation) followed by a check, if the player describe in detail what he is doing while searching I'll either give him advantage if it's a general description or an automatic success if it's spot on "I pick up the rug and look for a trap door underneath"
So in my game searching a 20x20 room will take a group of 4 characters about 5 minutes.
Also, while the entire group is searching, who is standing guard?
Warder
Use the marching order guidelines, if a character from the back of the passage want to go to the front and listen to the door, and than another one want to do so and so on they are bound to make some noise, make them do a stealth check. Also who is keeping watch when everyone is so intent on the door? How long would it take for each character to listen? I go with about a minute-per-character to be certain, sometime more, depending on the situation.
Another thing I like doing is rolling for the PC behind the screen, that way he have no idea if he succeded or failed.
As for searching the room, throughly searching a 10x10 room should take a character about 5 minute (again varied by the situation) followed by a check, if the player describe in detail what he is doing while searching I'll either give him advantage if it's a general description or an automatic success if it's spot on "I pick up the rug and look for a trap door underneath"
So in my game searching a 20x20 room will take a group of 4 characters about 5 minutes.
Also, while the entire group is searching, who is standing guard?
Warder