Architectural configuration

Architectural Configuration was the ability a TARDIS had to move rooms around and delete rooms as if it were a computer. If a TARDIS was sluggish, a room could be jettisoned (or "deleted").

Deletion also could be used to provide momentum should a TARDIS need to escape a threat. The number of rooms that were required to be deleted varied depending on the situation. The danger in Architectural Configuration was that there was a chance the console room could be deleted.

During his exile on Earth, the Third Doctor altered the TARDIS' Architectural Configuration software to relocate the console outside the ship (as it was too big to go through the doors), allowing him to work on it in his lab. (PDA: The Face of the Enemy, DW: The Ambassadors of Death, Inferno, Day of the Daleks)

The Fourth Doctor jettisoned Romana's room after she left when the TARDIS wouldn't dematerialise. (DW: Logopolis) In another incarnation, 25% of the TARDIS was jettisoned to allow the TARDIS to escape from Event One. In the process, the Zero Room was jettisoned. (DW: Castrovalva)

When the TARDIS was reconfigured into a multi-dimensional city, the Seventh Doctor accessed Architectural Configuration to trap the Process. He later used it to create a spiral staircase to the Process's Tower. (NA: Cat's Cradle: Time's Crucible)