A system for facilitating creation of a new radiation treatment plan, the system comprising: a database of previously planned radiation treatment plans of other patients for radiation treatment; memory that stores computer-executable instructions; characterised by comprising at least one processor configured to execute the computer-executable instructions, which, when executed, cause the at least one processor to provide: a prediction component configured to receive treatment parameters from a user interface or patient image parameters from a feature extractor, and to predict, based on one or more features associated with patient data, at least one metric comprising a predictor of a treatment outcome, wherein the prediction component has learned using previously planned radiation treatment plans to predict the at least one metric based on features extracted from patient data of patients associated with previously planned radiation treatment plans; a search component configured to search the database and identify, based on the at least one predicted metric, at least one radiation treatment plan from the database of previously planned radiation treatment plans, the at least one radiation treatment plan identified as having a match to the at least one predicted metric; and a user interface configured to present, to a user, at least one radiation treatment plan identified by the search component or one or more parameters from a treatment plan identified by the search component to allow the user to view and/or edit a patient treatment plan being created for the patient. a database of previously planned radiation treatment plans of other patients for radiation treatment; memory that stores computer-executable instructions; characterised by comprising at least one processor configured to execute the computer-executable instructions, which, when executed, cause the at least one processor to provide: a prediction component configured to receive treatment parameters from a user interface or patient image parameters from a feature extractor, and to predict, based on one or more features associated with patient data, at least one metric comprising a predictor of a treatment outcome, wherein the prediction component has learned using previously planned radiation treatment plans to predict the at least one metric based on features extracted from patient data of patients associated with previously planned radiation treatment plans; a search component configured to search the database and identify, based on the at least one predicted metric, at least one radiation treatment plan from the database of previously planned radiation treatment plans, the at least one radiation treatment plan identified as having a match to the at least one predicted metric; and a user interface configured to present, to a user, at least one radiation treatment plan identified by the search component or one or more parameters from a treatment plan identified by the search component to allow the user to view and/or edit a patient treatment plan being created for the patient. a prediction component configured to receive treatment parameters from a user interface or patient image parameters from a feature extractor, and to predict, based on one or more features associated with patient data, at least one metric comprising a predictor of a treatment outcome, wherein the prediction component has learned using previously planned radiation treatment plans to predict the at least one metric based on features extracted from patient data of patients associated with previously planned radiation treatment plans; a search component configured to search the database and identify, based on the at least one predicted metric, at least one radiation treatment plan from the database of previously planned radiation treatment plans, the at least one radiation treatment plan identified as having a match to the at least one predicted metric; and a user interface configured to present, to a user, at least one radiation treatment plan identified by the search component or one or more parameters from a treatment plan identified by the search component to allow the user to view and/or edit a patient treatment plan being created for the patient.